The db.api module provides a useless indirection to the only
implementation we ever had, sqlalchemy. Let's use that directly instead
of the wrapper.
Change-Id: I80353cfed801b95571523515fd3228eae45c96ae
When a deployment is deleted the metadata needs to be pushed so that
stale deployment data is not present in the metadata. There is a risk
that stale data will mask other deployments.
Change-Id: I3df4d9a27be5e59609ac4374556d3c0c707b068b
Closes-Bug: #1523705
In Heat objects, the default value of nullable attribute is
set in many of the object's fields, which is not required
as oslo object Field defines nullable as False by default
Change-Id: I0164b64c043816f624aeba19561a4a5f8d36689d
Closes-bug: #1439957