fixed init.py to add zones as master instead of native

init.py

     out = container.exec_run(['pdnsutil', 'create-zone', zone])
     if out is not None:
         out = out.decode('UTF-8')
-        return out == 'Creating empty zone \'%s\'\n' % (zone) # might to strict, but as we can not get return code
+        if out != 'Creating empty zone \'%s\'\n' % (zone): # might to strict, but as we can not get return code
+            return False
+        out = container.exec_run(['pdnsutil', 'set-kind', zone, 'master'])
+        out = out.decode('UTF-8')
+        return out == '';
     return False
 
 def get_tsig_keys(container):