neutron-rootwrap-xen-dom0 handles data from stdin

The neutron-rootwrap-xen-dom0 script and the netwrap plugin have been
modified to pass stdin from one to the other.

Change-Id: Ie97980873ed95f2c96eb68f8de611de1a733b130
Closes-Bug: #1259748
Corrects broken format strings in check_i18n.py

In tools/check_i18n.py, the error messages printed out
had format strings that included 5 interpolations, but only
four variables were supplied. This patch simply corrects that
mismatch by including the name of the predicate or checker
that failed.

Closes-Bug: #1263813
Change-Id: I5cacee9ea000f56a9ef45f07367e85f20fa333c7
Add security groups tables for ML2 plugin via migration

Copy the migration from revision 3cb5d900c5de

Change-Id: Ie0f6f14d69e896727715ecce573b81275c7869dc
Closes-Bug: #1263304
Use base.BaseTestCase in NVP config test

BaseTestCase setup stdout/stderr capture and
it is better to be used.

Change-Id: I3537a633125e5e474fda660581f41e5f57af26ca
Closes-Bug: 1262550
Merge "Corrects broken format strings in check_i18n.py"
Merge "Add security groups tables for ML2 plugin via migration"
Merge "neutron-rootwrap-xen-dom0 handles data from stdin"