Set fake rpc backend impl for TestLinuxBridgeAgent

Fixes bug 1153845

Change-Id: I692bfc16dbd52dacd2a9418f0bd63c3143a25025
Resolves ryu plugin unittest errors

Removed obsolete DATABASE value tests in ryu/test_defaults.py
Added fake_ryu client in test_ryu_security_group.py
Imported quantum.plugins.ryu.db.models_v2 in test_ryu_plugin.py

Fixes bug #1151642

Change-Id: I60e5aee90da9fa32bd285e6f6bbd95cd7ee1ce2c
Registers root_helper option for test_iptables_firewall

Fixes bug #1146478

Change-Id: I908a142d9463719e7b3c94aa1d699d329c9259de
Do not disable propagate on root logger

Bug 1154895

Change-Id: I7aedb82d11b6b0094f0d874e87b7c35209981e25
Imported Translations from Transifex

Change-Id: I0d2ce31853d49efa61c271f3c1f4cdc51a0d0283
Merge "Do not disable propagate on root logger"
Merge "Registers root_helper option for test_iptables_firewall"
Merge "Set fake rpc backend impl for TestLinuxBridgeAgent"