add ontology batch parse processing

serializes ontology version parsing for import/sync/push
disable retrying ontology parsing
don't stop on hets errors
actually use the new parsing system
parallelize by files

ontologies of the same files are parsed sequentially
use current instead of last
fix looping of worker
require sidekiq test helper
add specs for batch parsing of ontologies
batch parse spec should only expect change of jobs

It is possible to push more than one BatchParse job on the
queue (parallelization optimization).
Merge pull request #674 from ontohub/405-wrong_version_analyzed

405 wrong version analyzed