Make Handler tests easier to use.

[Endre Karlson]

Instead of declaring _init_handler in each test try to streamline this in the baseclass instead.

Something like _init_handler calls a _pre_init_handler to setup anything that needs to be overriden pr test like domains or whatever extras it needs.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/16394

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/16394
Committed: http://github.com/stackforge/moniker/commit/d56fb2857d818ffd14330b23ac224152c8cf8424
Submitter: Jenkins
Branch: master

commit d56fb2857d818ffd14330b23ac224152c8cf8424
Author: Endre Karlson <email address hidden>
Date: Sun Nov 18 20:02:23 2012 +0100

    Generalize testcases for handlers, bug #1080415

    Change-Id: I0fbbc41e807c1fa7a61be33ed3724b10b6d6a392

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/16457

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/16457
Committed: http://github.com/stackforge/moniker/commit/26a96222ebd41b6a12dab4bc166eeb664d6a812a
Submitter: Jenkins
Branch: master

commit 26a96222ebd41b6a12dab4bc166eeb664d6a812a
Author: Endre Karlson <email address hidden>
Date: Mon Nov 19 20:40:19 2012 +0100

    Generalize tests of plugins take 2, bug #1080415

    Change-Id: I6162bc4074ae389564b7cc82ca630e4f65ba3dbc