Build the replicaton-manager test

The test wasn't built as it is not a part of the test suite. The
executable should be built but it should not be added to the test suite.

Changed the management script to only add the configuration and added a
call to it at the start of the test.

maxscale-system-test/manage_mrm.sh

@@ -117,9 +117,6 @@ EOF
     do_ssh <<EOF
 sudo mkdir -p /etc/replication-manager/
 sudo cp ./config.toml /etc/replication-manager/config.toml
-sudo systemctl stop replication-manager
-sudo replication-manager bootstrap --clean-all
-sudo systemctl restart replication-manager
 EOF
 }