fixed logstash openstack plugin rule
Merge remote-tracking branch 'origin/feature/CLOUDIFY-2134-cosmo-python-dsl-parser' into feature/CLOUDIFY-2134-cosmo-python-dsl-parser
CLOUDIFY-2134

Changed dsl validation to use the new parser. Still from java for now.
This requires now a full management bootstrap for validation since we need to be able to dispatch tasks to the celery plugin and upload files to the jetty