Fix unavailable MCS link

MapR control System service does not
start because of wrong permissions of
ssl_keystore file. This is fixed by
changing owner of this file to mapr.

Change-Id: I17ad1abd324a56324ea162c3b3f3a531e4b2003f
Closes-Bug: #1566910

sahara/plugins/mapr/services/management/management.py

@@ -15,6 +15,7 @@
 
 import sahara.plugins.mapr.domain.node_process as np
 import sahara.plugins.mapr.domain.service as s
+import sahara.plugins.mapr.util.commands as cmd
 import sahara.plugins.mapr.util.validation_utils as vu
 
 
@@ -43,6 +44,8 @@ METRICS = np.NodeProcess(
 
 
 class Management(s.Service):
+    SSL_KEYSTORE = '/opt/mapr/conf/ssl_keystore'
+
     def __init__(self):
         super(Management, self).__init__()
         self._ui_name = 'Management'
@@ -55,3 +58,7 @@ class Management(s.Service):
             vu.at_least(1, WEB_SERVER),
             vu.odd_count_of(ZOOKEEPER),
         ]
+
+    def post_install(self, cluster_context, instances):
+        instance = cluster_context.get_instance(WEB_SERVER)
+        cmd.chown(instance, 'mapr:mapr', self.SSL_KEYSTORE)