Prevents a portinfo deletion in vm migration with NEC plugin.

Fixes: Bug 1160193

This patch prevents a portinfo deletion at the end of the migration sequence
by ignoring port_removed message from the source host.

Change-Id: I96932587b9d660aa01f8fcae0b0426c849d6c483
Fix for Cisco plugin physical device config error

This patch fixes a bug with the Cisco plugin where subsequent vlan id's
would overwrite the existing trunking config on a switch interface.

Change-Id: I5e97c00062f687838e60e5dc9470f4a62289676b
Fixes: Bug #1161946
Merge "Prevents a portinfo deletion in vm migration with NEC plugin."
Merge "Fix for Cisco plugin physical device config error"