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

roles/ipareplica/files/py3test.py

@@ -0,0 +1,9 @@
+#!/usr/bin/python3
+
+# Test ipaerver python3 binding
+from ipaserver.install.server.replicainstall import install_check
+
+# Check ipapython version to be >= 4.6
+from ipapython.version import NUM_VERSION, VERSION
+if NUM_VERSION < 40590:
+    raise Exception("ipa %s not usable with python3" % VERSION)