Remove options 'openshift_hosted_registry_replicas=3'

[netzzer]

Just found this at https://github.com/openshift/openshift-ansible/blob/master/inventory/hosts.example

Registry replicas (optional)
# Unless specified, openshift-ansible will calculate the replica count
# based on the number of nodes matching the openshift registry selector.

I commented out line below and 3 registry pods were created for my OCP deployment because of there being 3 infra nodes.

openshift_registry_selector="region=infra"
#openshift_hosted_registry_replicas=3

[netzzer]

Fixed with PR#17