NVP metadata access - create elevated context once

Bug 1155051

Create elevated context in handle_metadata_access_network and then
pass it to the create or remove function.

Change-Id: Id8f81419fbbc3616e216e4da0c16898757905933
Fix DB query returning ready devices in LoadBalancerCallbacks

fixes bug 1156782

Change-Id: I6efdb32955c1b1f8f3dec7b3b1581e97ea0af4d8
Merge "Fix DB query returning ready devices in LoadBalancerCallbacks"
Fix typo in policy.json and checks in nicira plugin

Bug 1155379

This patch removes extra colons from policy.json.
Also, it fixes some checks in the nicira plugin which were not
passing correctly the target resource for the policy engine.

Change-Id: I89a1d170818173eaa90b50158289a06455febadc
Imported Translations from Transifex

Change-Id: I7e5b222e5b8609631f955dc552412ff0023dff46
Merge "Imported Translations from Transifex"
Merge "NVP metadata access - create elevated context once"
Ensure that lockfile are defined in a common place

Fixes bug 1158146

Change-Id: I0e986eb16a7ec5b9972a37af583f697ba3624a80