Imported Translations from Transifex

Change-Id: I696ef1e400891af9d128b3badb9696a88217bb3b
Raise an error from ovs_lib list operations

Previously list operations in ovs_lib returns an empty list
if RuntimeError occurs and a caller cannot distinguish an error
from normal results. This commit changes ovs_lib list operations
(get_vif_port_set, get_vif_ports, get_bridges) to raise an
exception when RuntimeError occurs.

Note: callers of these commands are ovs/nec/ryu-agent and ovs_cleanup.
- plugin agents: these commands are inside in try/except clause
  in daemon loop and there is no need to change.
- ovs_cleanup: there is no error catch logic in main() at now
  and it calls commands other than ovs_lib, so it can be cleanup
  later if required.

It also fixes the code to use excutils.save_and_reraise_exception
when reraising an exception.

Change-Id: I2aa3b51b8661c75846cb588c08c8f8ee00c37004
Closes-Bug: #1277029
NSX: Fix possible deadlock in sync code

This patch removes the call to nsx from within the db transcation
which can cause deadlock if another request comes in during this time.

Change-Id: If16b53a77997bccfdff2554dead26f42e23eaec9
Closes-bug: #1278991
Add DB mappings with NSX logical switches

This patch introduces DB mappings between neutron network and NSX
logical switches, thus not requiring anymore the Neutron network
ID to be equal to the NSX one.

This change is necessary for enabling asynchronous operations in
the NSX plugin.

This patch also performs NVP/NSX renaming where appropriate.

Related to blueprint nvp-async-backend-communication
Related to blueprint nicira-plugin-renaming

Change-Id: Ic4b65730ee5f9ca5f76f89eb2528709c9cc7973e
Merge "Imported Translations from Transifex"
Merge "NSX: Fix possible deadlock in sync code"
Merge "Raise an error from ovs_lib list operations"
Merge "Add DB mappings with NSX logical switches"