This patch drops the obsolete openstack.common.exception module.

Most project should define their own exception based on their API and
the context they evolve in. Many projects don't use this, only neutron,
cinder and heat used it. I've copy pasted the few exceptions that they
were using, but that's still by far less code than this whole file.
Ultimately that will let them a chance to remove or shring their own
exception.py. I don't think most projects should have one anyway.

Change-Id: Ia8b2b29bd443233def324e97de7342c2634bccff
Closes-Bug: #1208734

This change requires hacking >0.5.5

Change-Id: Ic36fa0502548335d433f3fbe663854523dd04397

We now have a deprecated package in Oslo where deprecated modules /
packages will be moved. In order to make this more clear and warn users,
this patch adds a warning in deprecated's __init__.py module.

Change-Id: Id7097da1b034499fec1b6d44a358223476d9ba83

H404 - multi line docstring should start with a summary.

Change-Id: I2099e1ee81ff9657f7a07401b8e8f3327d03bdbd

As we are planning to deprecate the wsgi module, move it
out of the main openstack/common folder to the new
"deprecated" folder.

Move some of the middleware classes into the middleware
package, since those are still useful and should be
maintained.

There's still work to do to remove the dependency of the
size limit middleware on the Request class in the now
deprecated wsgi module.

Refer to the mailing list thread at
http://lists.openstack.org/pipermail/openstack-dev/2013-May/009666.html
for additional details.

Change-Id: I05ff583ef37174835393905a3066390f400ffdcf
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>