AMBARI-7784 Ganglia Monitor install fail on HDP-2.2 (dsen)

ambari-server/src/main/resources/stacks/HDP/2.0.6/hooks/after-INSTALL/scripts/shared_initialization.py

@@ -22,7 +22,8 @@ from resource_management import *
 def setup_hdp_install_directory():
   import params
   if params.rpm_version:
-    Execute(format('ambari-python-wrap /usr/bin/hdp-select set all `ambari-python-wrap /usr/bin/hdp-select versions | grep ^{rpm_version}- | tail -1`')
+    Execute(format('ambari-python-wrap /usr/bin/hdp-select set all `ambari-python-wrap /usr/bin/hdp-select versions | grep ^{rpm_version}- | tail -1`'),
+            only_if=format('ls -d /usr/hdp/{rpm_version}-*')
     )
 
 def setup_config():