Fix designate db instantation
Fix designate db instantation

designate::central now requires designate::db
(I696745e2d57aade6cbb0fe89e334fddf1beaafdb), so we need to instantiate
the latter first.

Change-Id: I15cdc27468f6e54dc14c8ffd818f326cb93ba2e3

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo