Raise an error when rolling back an application deployment. Fixes #421

Author: rtnpro

atomicapp/nulecule/main.py

@@ -250,6 +250,7 @@ def run(self, cli_provider, answers_output, ask,
             logger.debug('Nulecule run error: %s' % e, exc_info=True)
             logger.info('Rolling back changes')
             self.stop(cli_provider, ignore_errors=True, **kwargs)
+            raise NuleculeException()
 
     def stop(self, cli_provider, ignore_errors=False, **kwargs):
         """