Shorten the path of the nicira nvp plugin.

 * s+[/.]nicira_nvp_plugin++
 * Backwards compatibility is maintained by importing the
   nicira package as nicira_nvp_plugin in the plugins package.
 * It may be necessary to remove stale .pyc/.pyo files under the
   nicira path after applying this patch.
 * DocImpact
 * Addresses bug 1166307

Change-Id: I241a2a75106398506b01bcb7a6ddbaafa1b7bd30
Ensure unit tests work with all interface types

Fixes bug 1167520

Change-Id: I42ed3a5718d771924caffba3f58340e7f1d2e2ad
Merge "Ensure unit tests work with all interface types"
Imported Translations from Transifex

Change-Id: Ib2ba93e3c9754de63f030b9572a108343bae9c74
Merge "Shorten the path of the nicira nvp plugin."