Changed parsing for config file to accept configurable location of openstackwatch.ini file.

Change-Id: I93771b0abeff2908a586132c58c20fa21a62855b
Reviewed-on: https://review.openstack.org/24225
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Elizabeth Krumbach <lyz@princessleia.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins