AMBARI-15797. Ambari installation failing in RHEL7 during setup (aonishuk)

ambari-server/src/main/python/ambari_server/dbConfiguration_linux.py

@@ -335,9 +335,9 @@ class PGConfig(LinuxDBMSConfig):
   else:
       PG_INITDB_CMD = "%s %s initdb" % (SERVICE_CMD, PG_SERVICE_NAME)
 
-  PG_START_CMD = "%s %s start" % (SERVICE_CMD, PG_SERVICE_NAME)
-  PG_RESTART_CMD = "%s %s restart" % (SERVICE_CMD, PG_SERVICE_NAME)
-  PG_HBA_RELOAD_CMD = AMBARI_SUDO_BINARY + " su postgres -l -c '%s %s reload'" % (SERVICE_CMD, PG_SERVICE_NAME)
+  PG_START_CMD = AMBARI_SUDO_BINARY + " %s %s start" % (SERVICE_CMD, PG_SERVICE_NAME)
+  PG_RESTART_CMD = AMBARI_SUDO_BINARY + " %s %s restart" % (SERVICE_CMD, PG_SERVICE_NAME)
+  PG_HBA_RELOAD_CMD = AMBARI_SUDO_BINARY + " %s %s reload" % (SERVICE_CMD, PG_SERVICE_NAME)
 
   PG_HBA_CONF_FILE = None
   PG_HBA_CONF_FILE_BACKUP = None