Rename the 'tests' directory to 'ipa-tests', and create an ipa-tests RPM
containing the test suite

Part of the work for: https://fedorahosted.org/freeipa/ticket/3654

Ticket: https://fedorahosted.org/freeipa/ticket/3352
Design: http://freeipa.org/page/V3/Drop_CSV

These were never set to anything but the defaults.

Part of work for https://fedorahosted.org/freeipa/ticket/3352

https://fedorahosted.org/freeipa/ticket/3323

This switch drops the preceding 'u' from strings within Public error messages.

This patch also addresses the related unfriendly 'u' from re-raising errors from netaddr.IPAddress by passing a bytestring through the function.

Also switched ValidationError to TypeError in validate_scalar per jcholast@redhat.com.

Ticket: https://fedorahosted.org/freeipa/ticket/3121
Ticket: https://fedorahosted.org/freeipa/ticket/2588

Do not print list of possible values as "%r" but simply as a list
of quoted values which should make it easier to read for users.
Also add a special case when there is just one allowed value.

https://fedorahosted.org/freeipa/ticket/2869

Parameter Decimal does not have a sufficient value checks. Some values
cause Decimal parameter with a custom precision to crash with
an unhandled exception.

Improve parameter conversion and normalization operations to handle
decimal exceptions more gracefully. Decimal parameter now also has
new attributes enabling 2 new validation/normalization methods:
 * exponential: when False, decimal number is normalized to its
                non-exponential form
 * numberclass: a set of allowed decimal number classes
                (e.g. +Infinity, -Normal, ...) that are enforced
                for every Decimal parameter value

https://fedorahosted.org/freeipa/ticket/2705

Replace all occurences of create_default with equivalent default_from
and remove create_default from the framework. This is needed for
proper parameter validation, as there is no way to tell which
parameters to validate prior to calling create_default, because
create_default does not provide information about which parameters are
used for generating the default value.

Splitting on commas is not an idempotent operation:
'a,b\,c' -> ('a', 'b,c') -> ('a', 'b', 'c')

That means we can't do it when the call is forwarded, so this is only
done on the CLI. The UI already sends values as a tuple.

Replace escaping in the csv parser with quoting. Quoted strings can have
embedded commas instead of having to escape them. This prevents the csv
parser from eating all escape characters.

Also, document Param's csv arguments, and update tests.

https://fedorahosted.org/freeipa/ticket/2417
https://fedorahosted.org/freeipa/ticket/2227

Having float type as a base type for floating point parameters in
ipalib introduces several issues, e.g. problem with representation
or value comparison. Python language provides a Decimal type which
help overcome these issues.

This patch replaces a float type and Float parameter with a
decimal.Decimal type in Decimal parameter. A precision attribute
was added to Decimal parameter that can be used to limit a number
of decimal places in parameter representation. This approach fixes
a problem with API.txt validation where comparison of float values
may fail on different architectures due to float representation error.

In order to safely transfer the parameter value over RPC it is
being converted to string which is then converted back to
decimal.Decimal number on a server side.

https://fedorahosted.org/freeipa/ticket/2260