Delete last bits of bin/.  With the move to entrypoints these aren't
needed anymore.

Update CONF.bindir to default to
  os.path.join(sys.prefix, 'local', 'bin')

Part of blueprint entrypoints-plugins

Change-Id: I95250d3779433e7b85aaa889a873b16c86a7d2be

As part of the move of plugins to entrypoints, take advantage of the
entrypoints based console scripts, which will make our command line scripts
available for unittesting.

Part of blueprint entrypoints-plugins

Co-authored-by: Michael Still <mikal@stillhq.com>

Change-Id: I5f17348b7b3cc896c92263dd518abb128757d81f

The gettext.install() function installs a builtin _() function which
translates a string in the translation domain supplied to the install()
function. If gettext.install() is called multiple times, it's the last
call to the function which wins and the last supplied translation domain
which is used e.g.

 >>> import os
 >>> os.environ['LANG'] = 'ja.UTF-8'
 >>> import gettext
 >>> gettext.install('keystone', unicode=1, localedir='/opt/stack/keystone/keystone/locale')
 >>> print _('Invalid syslog facility')
 無効な syslog ファシリティ
 >>> gettext.install('nova', unicode=1, localedir='/opt/stack/nova/nova/locale')
 >>> print _('Invalid syslog facility')
 Invalid syslog facility

Usually this function is called early on in a toplevel script and we
assume that no other code will call it and override the installed _().
However, in Nova, we have taken a shortcut to avoid having to call it
explicitly from each script and instead call it from nova/__init__.py.

This shortcut would be perfectly fine if we were absolutely sure that
nova modules would never be imported from another program. It's probably
quite incorrect for a program to use nova code (indeed, if we wanted to
support this, Nova code shouldn't use the default _() function) but
nevertheless there are some corner cases where it happens. For example,
the keystoneclient auth_token middleware tries to import cfg from
nova.openstack.common and this in turn causes gettext.install('nova')
in other projects like glance or quantum.

To avoid any doubt here, let's just rip out the shortcut and always
call gettext.install() from the top-level script.

Change-Id: If4125d6bcbde63df95de129ac5c83b4a6d6f130a

The cfg API is now available via the oslo-config library, so switch to
it and remove the copied-and-pasted version.

Add the 2013.1b4 tarball to tools/pip-requires - this will be changed
to 'oslo-config>=2013.1' when oslo-config is published to pypi. This
will happen in time for grizzly final.

Add dependency_links to setup.py so that oslo-config can be installed
from the tarball URL specified in pip-requires.

Remove the 'deps = pep8==1.3.3' from tox.ini as it means all the other
deps get installed with easy_install which can't install oslo-config
from the URL.

Make tools/hacking.py include oslo in IMPORT_EXCEPTIONS like it already
does for paste. It turns out imp.find_module() doesn't correct handle
namespace packages.

Retain dummy cfg.py file until keystoneclient middleware has been
updated (I18c450174277c8e2d15ed93879da6cd92074c27a).

Change-Id: I4815aeb8a9341a31a250e920157f15ee15cfc5bc

Apparently exception.DBError disappeared at some point, but nova-
compute was still using it. Since it was a stretch in the first
place, and nothing else in exception.py looks reasonable, this
adds exception.DBNotAllowed.

Fixes bug 1120390

Change-Id: Ifbfa0b09f3dc011ad87f6f3b06eb0fdaa7247ec0

This adds a wedge between nova-compute and the database implementation
to specifically catch, log, and deny accesses. Theoretically, this
should not be needed as a production environment would not even have
the compute nodes configured to talk to the database. However, testing
and upgraded environments may retain database access and thus avoid
hitting real issues that can be fixed up prior to release. Putting
this into the tree now will help ensure we have a consistent error
scenario for test setups prior to release.

Note that if nova is configured to use a local conductor, we do not
insert the wedge, which provides an easy out for anyone needing to
get a production system past a missed database access.

Related to bp no-db-compute.

Based on Russell's original tracer hack:

   I328fa92d5bfdadd5022f5c7efe981396d8ae7962

Change-Id: I478230220633e0d2ff94b6a4d756e07eab8517d7

Previously we were waiting for conductor to respond to a ping() in the
compute manager.  This patch moves this down to the base Service class.
A nova service binary can indicate that db access is not allowed and if
so, as soon as the service gets created, it will block while waiting for
conductor to respond.

The compute service has been updated to use this.  This should not
result in any real functional difference.

The reason for this is that there is some database access that needs to
be avoided down at this level.  This allows us to divert these actions
to conductor if needed.

Part of bp no-db-compute.

Change-Id: Idd6387b9428e3f9f4e4dbfe51293693238b2daf0

Even though the compute_topic opt is used outside nova.compute.rpcapi,
it makes sense for the RPC module to "own" the topic option.

blueprint: scope-config-opts
Change-Id: I453951825481b9a5ba1865f6bf1223f7b1e25f98

The only reason for importing nova.config now is where one of the
options defined in that file is needed. Rather than importing
nova.config using an import statement, use CONF.import_opt() so
that it is clear which option we actually require.

In future, we will move many options out of nova.config so many
of these import_opt() calls will either go away or cause a module
other than nova.config to be imported.

Change-Id: I0646efddecdf2530903afd50c1f4364cb1d5dce1

Modules import nova.config for two reasons right now - firstly, to
reference nova.config.CONF and, secondly, if they use one of the
options defined in nova.config.

Often modules import nova.openstack.common.cfg and nova.config
which is a bit pointless since they could just use cfg.CONF if
they just want to nova.config in order to reference CONF.

Let's just use cfg.CONF everywhere and we can explicitly state
where we actually require options defined in nova.config.

Change-Id: Ie4184a74e3e78c99658becb18dce1c2087e450bb