Standardize logging for v3 api extensions

- add log translation hints
- remove unneeded logging imports

Change-Id: I4845ee70c23336b61e5aac70b9b5021e114f8ac5
Make API name validation failure deterministic

Makes the testing of a valid name in the API deterministic
with respect to failing when an empty name is supplied
by the user. Formerly it could fail either of two constraints
- must be at least one character long
- does not match the valid regexp which requires one character

The lack of deterministic behaviour was causing issues with
some unittests when PYTHONHASHSEED is not set to 0 because
of the two failure modes. The second constraint for validation
of names is now modified so it allows empty strings but overall the
behaviour remains the same because of the first constraint.

Change-Id: Iea89bb329a8939af5168926717b5c13bdf2a7f62
Partial-Bug: 1350287
Check compulsory flavor create parameters exist

Check that the name, ram, vcpu and disk parameters exist
in the request for flavor creation in order to be able to
return a more informative error message to a user when they
are not supplied.

Change-Id: I7fd235f8b57e5ecba37e50d6f0ce0a3866c1cd55
Closes-Bug: 1253525
Imported Translations from Transifex

Change-Id: I2749dc18aac367faf827caf8f1f2699fbf8ce954
libvirt: reduce indentation in is_vif_model_valid_for_virt

For some reason the is_vif_model_valid_for_virt method is using
8 space indentation instead of the normal 4 spaces.

Change-Id: Ibbc86af5fbea3a115d344907a1d95fb184b61ebc
Objectify last uses of direct db access in network/floating_ips

These were previously skipped since they're not used when all services are
on master. However, they're trivial to convert and help clean up our
reports of "what's left". Since we technically need to keep them in the
tree until we bump the network RPC version, this converts them and adds
tests.

Related to blueprint compute-manager-objects-juno

Change-Id: I17296a807524a76caa10e41ea2b05c7514169fa2
Merge "Check compulsory flavor create parameters exist"
Merge "Standardize logging for v3 api extensions"
Merge "Objectify last uses of direct db access in network/floating_ips"
Merge "Imported Translations from Transifex"
Merge "Make API name validation failure deterministic"
Merge "libvirt: reduce indentation in is_vif_model_valid_for_virt"