Use --get function instead of --has to validate presence of an object…

… in the given section

Closes-Bug: 1660278

Change-Id: Id8fc9118b358c2374ceea472892a9a5eaf3e4133

contrail_provisioning/common/base.py

@@ -380,10 +380,9 @@ def get_config(self, fl, sec, var):
     def has_config(self, fl, sec, var):
         has = False
         with settings(warn_only=True):
-            output = local("openstack-config --has %s %s %s" % (
+            output = local("openstack-config --get %s %s %s" % (
                 fl, sec, var), capture=True)
-            has = bool(int(output))
-        return has
+        return output.succeeded
 
     def setup(self):
         self.disable_selinux()