Fix listing of Server in floating-ip-list

Add a translation from instance_id to server_id to accommodate
for the adjusted user output.

Closes-Bug: #1324857

Change-Id: Ifaa15f6907b5efae7431eb1741b7fae4b3540a8c
Convert Quota tests to httpretty

Change-Id: I0b7e7a342f9dbb8d9db2d45e4a90ccb23210001a
blueprint: httpretty-testing
Convert security group rules tests to httpretty

Change-Id: I7b68712b05764661d3e7c3dcac7fce041e88e293
blueprint: httpretty-testing
Merge "Fix listing of Server in floating-ip-list"
Merge "Convert Quota tests to httpretty"
Merge "Convert security group rules tests to httpretty"