Provide atomic database access for ports in linuxbridge plugin

Fixes bug 1097541

Change-Id: I3b16b4504b7b61cebe44df5c169f4877969c8628
Fix i18n messages for cisco plugin

fix bug 1101676

Change-Id: I671092b4c47b77bc42474b5bf2f6b8d9791acce6
Fix i18n messages

Fix the last scraps of messages

Change-Id: I0494ab43fa95b7040de2b5a596fa08b9c73aab8d
set allocation_pool_id nullable=False

fixes bug 1103216

SQL Primary Keys cannot be null, so this patch fixes an
inconsistency between the models and SQL.  The databases were
correcting this automatically, so a migration is not required.

Change-Id: I724294580de9b86a2edfd4fdc6907e9469b6c552
Merge "Provide atomic database access for ports in linuxbridge plugin"
Merge "Fix i18n messages"
Merge "Fix i18n messages for cisco plugin"
Merge "set allocation_pool_id nullable=False"