Disable SwiftDisperion when deploying Ceph RGW

While not causing the deployment to fail, we should disable the
SwiftDispersion service when Ceph RGW is deployed.

Change-Id: I329380afb07bb62126cf57e39167bc2b20506b6c
Closes-Bug: #1907501

environments/ceph-ansible/ceph-rgw.yaml

@@ -1,5 +1,6 @@
 resource_registry:
   OS::TripleO::Services::CephRgw: ../../deployment/ceph-ansible/ceph-rgw.yaml
   OS::TripleO::Services::SwiftProxy: OS::Heat::None
+  OS::TripleO::Services::SwiftDispersion: OS::Heat::None
   OS::TripleO::Services::SwiftStorage: OS::Heat::None
   OS::TripleO::Services::SwiftRingBuilder: OS::Heat::None

environments/swift-external.yaml

@@ -1,6 +1,7 @@
 resource_registry:
   OS::TripleO::Services::ExternalSwiftProxy: ../deployment/swift/external-swift-proxy-baremetal-puppet.yaml
   OS::TripleO::Services::SwiftProxy: OS::Heat::None
+  OS::TripleO::Services::SwiftDispersion: OS::Heat::None
   OS::TripleO::Services::SwiftStorage: OS::Heat::None
   OS::TripleO::Services::SwiftRingBuilder: OS::Heat::None