Fix port creation issue appeared with postgresql backend

IPAllocationPool has relation to IPAvailabilityRange which is setup to
load eagerly. Eager loading is implemented with left outer join which is
incompatible with with_lockmode('update') on postgresql.
The fix redefines eager loading with options(joinedload) making it use
inner join.

fixes bug 1215350

Change-Id: I148d37f2a1c2a340327d36c240eb8173aee9219a
Enable authentication between PLUMgrid Director and Plugin

Implements blueprint plumgrid-plugin-rest-access

Change-Id: I0f9a6c39c09f756ee5fc7c9d6993e59b1e6be639
Merge "Fix port creation issue appeared with postgresql backend"
Imported Translations from Transifex

Change-Id: Ia664404f7d37fff4cbc76fb43227584fcdd106a2
Merge "Enable authentication between PLUMgrid Director and Plugin"
Merge "Imported Translations from Transifex"