heat engine fail to stop RPC service gracefully

[Kanagaraj Manickam]

In heat/engine/service.py, stop() is executed when the engine is being stopped. Below code raise exception as self.conn is not defined in code.

        # Stop rpc connection at first for preventing new requests
        LOG.info(_LI("Attempting to stop engine service..."))
        try:
            self.conn.close() <<<<<< --- self.conn is not defined one
        except Exception:
            pass

So this bug is filed to correct this block so that RPC service will stop and quit peacefully.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/156118

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/156118
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=5856a377d1b376c0a090712a9055dece78b29d5e
Submitter: Jenkins
Branch: master

commit 5856a377d1b376c0a090712a9055dece78b29d5e
Author: Kanagaraj Manickam <email address hidden>
Date: Mon Feb 16 09:58:20 2015 +0530

    Stop RPC server gracefully

    When engine service is stopped, this patch makes
    RPC server to get stopped gracefully.

    Change-Id: Id09ab95a574a63ee2ddb30ecc828b9820409a18f
    Closes-bug: #1419693

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/juno
Review: https://review.openstack.org/246163

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jeremy Stanley (<email address hidden>) on branch: stable/juno
Review: https://review.openstack.org/246163
Reason: I'm abandoning this change in preparation for deleting the stable/juno branch, which is now at end of life.