Imported Translations from Transifex

Change-Id: Iafc01f8b6a844f697db75a88d5c457197e62dec3
Add property port_id to RouterInterface

Since neutron router-interface-add api supports subnet_id and and
port_id so we should support it in heat resource RouterInterface.

Fixes bug #1223733

Change-Id: Ib0d7ffa3c478747a91b70beab4a78eadf7c9dfcb