Suppress expected exception messages in unit test

Closes-Bug: 1358120
Change-Id: Id3683d49d45c0077b93fd2241ebe11b1225c4ab2
Correct return values of mocked methods in LBaaS API test

Mocked methods of neutronclient should return data structure
which neutronclient returns, but Horizon internal API object
(which inherits APIDictWrapper) is returned so far.

Change-Id: Ifbaeea3234bc232c8bbd2bb6ed2dd8f236358d1b
Closes-Bug: #1360279
Provide a quick way to run flake8

"run_tests.sh -p" always checks every file for errors even though you
have probably only changed a handful. This patch adds "run_tests.sh -8"
which only checks the files that were modified in the HEAD commit or
the current working tree.

It is borrowed from the recent nova commit b011325cc6.
The related ML post is:
http://lists.openstack.org/pipermail/openstack-dev/2014-August/043346.html

Change-Id: If3c8e5e3e442257f796374edba02c3a23a85839e
Imported Translations from Transifex

Change-Id: Ice6aaa89cff04a931c7b4402c26ecbb1a3120989
Merge "Provide a quick way to run flake8"
Merge "Imported Translations from Transifex"
Merge "Correct return values of mocked methods in LBaaS API test"
Merge "Suppress expected exception messages in unit test"