Dummy strategy is not registered in the watcher_strategies entrypoint

[Vincent Françoise]

We need to make our DummyStrategy available so it gets registered when installing Watcher.

Solution:
watcher_strategies =
    basic = ...:BasicConsolidation
    dummy = ...:DummyStrategy

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/250396

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/250396
Committed: https://git.openstack.org/cgit/openstack/watcher/commit/?id=9078e1e1381bc721b534a462bcfbb61e9b4d3591
Submitter: Jenkins
Branch: master

commit 9078e1e1381bc721b534a462bcfbb61e9b4d3591
Author: Vincent Françoise <email address hidden>
Date: Thu Nov 26 14:16:18 2015 +0100

    Added 'dummy' entrypoint within watcher_strategies

    This should make our 'dummy' strategy available for use.
    I also removed all previously defined default goals, which means
    that they will have to define it themselves from now on.
    This can also be useful for future integration tests.

    Change-Id: I6c43eba941022a88851a199b56a6c20f017b9e71
    DocImpact
    Closes-Bug: #1520178