Create 'quota' table in folsom_initial

When using the stable icehouse branch
folsom_initial db migration does not create quotas table
for a plugin which had db quota support (quota-ext).

This bug was fixed as part of bug 1207402 in master.
Since this bug cannot be back ported, we back port only
the quota table related fix.

Closes-bug: #1372678

Change-Id: I933aaefb50e32234eaad5557322e4c89af2a47d0
Big Switch: Don't clear hash before sync

This patch removes the step of clearing the consistency
hash from the DB before a topology sync. This will ensure
that inconsistency will be detected if the topology sync
fails.

This logic was originally there to make sure the hash header
was not present on the topology sync call to the backend.
However, the hash header is ignored by the backend in a sync
call so it wasn't necessary.

Closes-Bug: #1379510
Change-Id: I2d58fa2aea3b692834d64192d06ace727c7df8a0
(cherry picked from commit 24e4110eb284078775496501ff81630eb1619c11)
Merge "Create 'quota' table in folsom_initial" into stable/icehouse
Merge "Big Switch: Don't clear hash before sync" into stable/icehouse
Merge branch 'stable/icehouse' of https://github.com/openstack/quantum into stable/icehouse