nvp plugin rxtx_factor readonly update port

The following change done in nova 7de916 started passing in the
rxtx_factor on update port rather than just on create_port which
is what we only originally supported. Therefore currently when
booting a vm and specifying --nic port-id it will fail to boot with:
Cannot update read-only attribute rxtx_factor. This patch is a work
around to allow the rxtx_factor value to be passed in on update port even
though we ignore the value. Later we'll implement updating rxtx_factor on
ports but this is a good work around for now.

Fixes bug: 1202406

Change-Id: Iedd488b7bdc9b1a1317000d249f03b0eafbea419
GRE tunnels should include local_ip.

This addresses the issue of having one or more multi-homed host.

Because you may only specify one local IP for a quantum agent, and
other hosts could be routed across different subnets (even for small
installations, for various reasons), it's important to also specify
the used local_ip when setting up the GRE tunnels. As long as the
address is routable on both ends, this will work. If the local_ip is
not specified, then traffic will mysteriously be dropped on one end
where the IP does not match the expected IP in the GRE tunnel.

Bug: https://bugs.launchpad.net/quantum/+bug/1184696

Change-Id: I5d612bf9e4f6652af8b155cdd1748d73ac4539ff
Signed-off-by: Adin Scannell <adin@scannell.ca>
Cisco plugin check for a valid nexus driver

The Cisco plugin model should check for a valid Nexus driver before performing any
operations on hardware nexus devices.

Change-Id: Ib7760cc7bb24e2c7f6692cbd8274aefa71dc21a1
Fixes: Bug #1202822
Imported Translations from Transifex

Change-Id: Iccd8aff56e7bf6ba45ab4ddc15aef05f1ab9ed30
Merge "GRE tunnels should include local_ip."
Merge "Cisco plugin check for a valid nexus driver"
Merge "nvp plugin rxtx_factor readonly update port"