copying oozie.warden to prevent failure

copying oozie.warden.conf should prevent possible
issues with packages installation.

Related bug: 1607704

Change-Id: I33e8f19037f61c1cbd310d7d703383083715f658

sahara/plugins/mapr/domain/node_process.py

@@ -59,6 +59,8 @@ class NodeProcess(object):
         self.execute_action(instances, Action.STOP)
 
     def execute_action(self, instances, action):
+        if len(instances) == 0:
+            return
         nodes = ','.join(map(lambda i: i.internal_ip, instances))
         args = {'service': self.name, 'action': action.name, 'nodes': nodes}
         command = WARDEN_MANAGED_CMD % args

sahara/plugins/mapr/services/oozie/oozie.py

@@ -91,6 +91,14 @@ class Oozie(s.Service):
 
     def post_configure(self, cluster_context, instances):
         super(Oozie, self).install(cluster_context, instances)
+        oozie_instances = cluster_context.filter_instances(instances,
+                                                           service=self)
+        for instance in oozie_instances:
+            with instance.remote() as r:
+                r.execute_command(
+                    'sudo cp '
+                    '/opt/mapr/oozie/oozie-%s/conf/warden.oozie.conf '
+                    '/opt/mapr/conf/conf.d' % self.version)
 
     def post_install(self, cluster_context, instances):
         oozie_inst = cluster_context.get_instance(OOZIE)