Redundant methods in DB heal script after alembic 0.7.1

[Henry Gessau]

Alembic 0.7.1 contains checks of foreign keys so method check_foreign_keys is not needed anymore. Heal script should be updated to make it possible to use alembic methods.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/138998

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/138998
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=8e5c24336bee834334e56a5ef8ccb66e380baa3b
Submitter: Jenkins
Branch: master

commit 8e5c24336bee834334e56a5ef8ccb66e380baa3b
Author: Ann Kamyshnikova <email address hidden>
Date: Thu Dec 4 12:21:04 2014 +0300

    Update heal_script for alembic 0.7.1

    Alembic 0.7.1 contains checks of foreign keys so
    method check_foreign_keys is not needed anymore.
    Heal script should be updated to make it possible to use alembic
    methods.

    Closes-bug: #1398417

    Change-Id: I7d0ba7f00567ae5a4dd0669ed86d6e8d554ca4ec