ipareplica py3test: Try to import promote_check if install_check is not defined

Since FreeIPA version 4.7.1 there is no install_check defined anymore in
ipaserver.install.server.replicainstall.

roles/ipareplica/files/py3test.py

 #!/usr/bin/python3
 
 # Test ipaerver python3 binding
+try:
     from ipaserver.install.server.replicainstall import install_check
+except ImportError:
+    from ipaserver.install.server.replicainstall import promote_check
 
 # Check ipapython version to be >= 4.6
 from ipapython.version import NUM_VERSION, VERSION