OpenStack Health api has a new functionality that allows users to
retrieve the grouping keys used on the dashboard page.
A few of them simply don't make sense for the users, since they
are too granular.
This commit includes a new default configuration that will ignore
these keys. In case you are interested on how I come up with these keys,
please check this patch: https://review.openstack.org/#/c/240453/
Change-Id: Ibe591d9af94c1cd8d5c1d4956c1c82b4a764b5b7