Restrict number of Swift workers to 1 on the undercloud
Restrict number of Swift workers to 1 on the undercloud

The number of requests to Swift on the undercloud is pretty low, while
the default number of services is set by the number of available CPU
cores. This is likely much to high and also increases memory
requirements et al, thus limiting this to 1 per service.

Change-Id: Ic6048b2a75120d44108ed2a7f3a04c4f38e63871

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates