Move away nested transaction from _ensure_default_security_group
This patch remove the nested transaction started in
_ensure_default_security_group, before calling create_security_group.
Instead, a nested transaction will be started inside
create_security_group.
The purpose of this change is to reduce the time period in which the db
transaction is open (to avoid races, db lock timeouts, etc), when creating
the default security-group.
Closes-Bug: #
1479558
Change-Id: Ia0efa72c70c2f405c851370b0b26770008e5ff95
Code Review / openstack-build / neutron-build.git / commit