NSX: Fix router-interface-delete returns 404 when router not in nsx

Previously, if one would run router-interface-delete and the router
was not found in NSX. Neutron would raise a 404 error and remove the interface
from the database. In this case it would be better if we did not raise
a 404 error as the caller shouldn't be aware that the backend is out of sync.

Closes-bug: #1291690

Change-Id: I2400f8b31817e6dd4bc8aa08f07e1613fc2deeae
Imported Translations from Transifex

Change-Id: I2e20faef71a104c1a58f20b9c0d8a14ed388a330
Change report_interval from 4 to 30, agent_down_time from 9 to 75

report_interval is how often an agent sends out a heartbeat to the
service. The Neutron service responds to these 'report_state' RPC
messages by updating the agent's heartbeat DB record.
The last heartbeat is then compared to the configured
agent_down_time to determine if the agent is up or down.
The agent's status is used when scheduling networks on DHCP
and L3 agents.

In the spirit of sane defaults suited for production, these values
should be bumped to reduce the load on the Neutron service
dramatically, freeing up CPU time to perform intensive operations.

DocImpact
Closes-Bug: #1293083
Change-Id: I77bcf8f66f74ba55513c989caead1f96c92b9832
Don't use root to list namespaces

A bit of low hanging fruit.  I just noticed that this hadn't been
fixed yet.

Change-Id: Iea9210098b6acf4ab24a89287529ff82986faaad
Closes-Bug: #1293818
Cisco plugin fails with ParseError no elem found

When the Cisco nexus plugin is configured on DevStack, the tempest
Neutron API test test_port_list_filter_by_router_id fails with the
following error:
     ParseError: no element found: line 1, column 0

The root cause is that the Cisco Nexus plugin model layer
is encapsulating each dictionary response from the OVS subplugin
into a list, whereas the WSGI layer is expecting a dictionary
response. The fix is not to encapsulate these responses into a list.

Change-Id: I4b589e8e5696c0eae43cafc46912b3d7f29bbdb6
Closes-Bug: #1284162
return false or true according to binding result

Change-Id: I23a47c6c7c9be989e65c144b2277c42eeaaade3f
Closes-Bug: 1294500
Merge "Imported Translations from Transifex"
Merge "Change report_interval from 4 to 30, agent_down_time from 9 to 75"
Merge "Don't use root to list namespaces"
Merge "Cisco plugin fails with ParseError no elem found"
Merge "return false or true according to binding result"
Merge "NSX: Fix router-interface-delete returns 404 when router not in nsx"