Full sync of quota_usages

Migration 203 added a user_id column to the quota_usages table.  Now
some usages are incremented/decremented on a per user basis but there
are preexisting usages stored with a NULL user, and some usages are
tracked per project but there are usages stored with a user_id.  These
quotas are never decremented leading to invalid quota limits being
enforced.

This migration performs a full sync of quotas, and removes the incorrect
rows for each resource type.

Change-Id: Iff96f81e36b135df94a6f25c9443d0e9333bd18f
Closes-Bug: #1212798