Add a role to run independent designate bind backends

Designate can manage multiple instances of bind backend instances and
there are advantages to running bind on dedicated hosts in some cases.

Change-Id: Ic0159e4efc862583baa646009aebe5b8168fcc36

roles/DesignateBind.yaml

@@ -0,0 +1,42 @@
+###############################################################################
+# Role: DesignateBind                                                         #
+###############################################################################
+- name: DesignateBind
+  description: |
+    Standalone role for bind instances being used as backends for
+    Designate
+  CountDefault: 1
+  tags:
+    - external_bridge
+  networks:
+    External:
+      subnet: external_subnet
+    InternalApi:
+      subnet: internal_api_subnet
+  default_route_networks: ['External']
+  HostnameFormatDefault: '%stackname%-designate-bind-%index%'
+  ServicesDefault:
+    - OS::TripleO::Services::Aide
+    - OS::TripleO::Services::AuditD
+    - OS::TripleO::Services::BootParams
+    - OS::TripleO::Services::CACerts
+    - OS::TripleO::Services::Collectd
+    - OS::TripleO::Services::DesignateBind
+    - OS::TripleO::Services::IpaClient
+    - OS::TripleO::Services::Ipsec
+    - OS::TripleO::Services::Kernel
+    - OS::TripleO::Services::LoginDefs
+    - OS::TripleO::Services::MetricsQdr
+    - OS::TripleO::Services::ContainersLogrotateCrond
+    - OS::TripleO::Services::Podman
+    - OS::TripleO::Services::Rhsm
+    - OS::TripleO::Services::Rsyslog
+    - OS::TripleO::Services::RsyslogSidecar
+    - OS::TripleO::Services::Securetty
+    - OS::TripleO::Services::Snmp
+    - OS::TripleO::Services::Sshd
+    - OS::TripleO::Services::Timesync
+    - OS::TripleO::Services::Timezone
+    - OS::TripleO::Services::TripleoFirewall
+    - OS::TripleO::Services::TripleoPackages
+    - OS::TripleO::Services::Tuned