Add and update subnet properties in Cisco N1kv plugin

Add dns nameservers and dhcp info in subnet create.
Update subnet properties.

Change-Id: I70e3f0261f6ba5433bbf08d33e2a34cdbb20fed2
Closes-Bug: #1276876
Skip a test for nicira service plugin

test_router_add_interface_subnet_with_port_from_other_tenant
is causing intermittent failures in unit tests because of
issues related with sql session autoflush.

This patch skips this test, since it is already covered
by another test case in the same module. This should prevent
job failures while the relevant bug is addressed.

Change-Id: Iad33dada61d17fad14e569e241f4079465b5f792
Related-Bug: 1280035
Merge "Skip a test for nicira service plugin"
Merge "Add and update subnet properties in Cisco N1kv plugin"
Imported Translations from Transifex

Change-Id: Iafb65bdd55952a9f8dba3f48c53c691f07ef344c
Implements Neutron routing API using Cisco appliances

Partially-implements blueprint: cisco-routing-service-vm

Change-Id: I9389f73d51ba1def31c6a25ffcd8cac4f2c545d7
Changes for PEP8 compliance

Change-Id: I3939dcc49dc41e4c1e99171ae719ab73a037a0ab