New role for ipareplica installation

The support for external cert files is not complete yet.

Please have a look at the example inventory file inventory/hosts.replica and
also the install and uninstall playbook files install-replica.yml and
uninstall-replica.yml

uninstall-replica.yml

@@ -0,0 +1,8 @@
+---
+- name: Playbook to unconfigure IPA replicas
+  hosts: ipareplicas
+  become: true
+
+  roles:
+  - role: ipareplica
+    state: absent