The MAAS metadata service is not loaded

In case of transient errors, the MAAS metadata service was
not retrying to fetch metadata information. This patch
fixes the issue.

Change-Id: I0612b4e97be4c43e497c59a4eff20c6d0ab7c1db
Closes-Bug: #1409790

cloudbaseinit/metadata/services/maasservice.py

@@ -58,7 +58,7 @@ class MaaSHttpService(base.BaseMetadataService):
             LOG.debug('MaaS metadata url not set')
         else:
             try:
-                self._get_data('%s/meta-data/' % self._metadata_version)
+                self._get_cache_data('%s/meta-data/' % self._metadata_version)
                 return True
             except Exception as ex:
                 LOG.exception(ex)