adjust ontology factories with regard to versions

There were some problems with the way
the versions were handled. Now the version
should reflect path data in the ontology.
add test for correct child-versions display

Add a cucumber integration test to display
the right ontology-versions in the tab for
child-ontology versions.
avoid mocha deprecation warnings

This also deactivates mocha entirely for rspec
and uses rspec-mocks explicitly instead.
improve handling of files and parsing in rspec.
fix cleaning of redis during rspec runs.
fix the ontology-version controller spec

Now we actually check for assignments of
child-versions.
translate ontology_version test to rspec.
silence shell-output from git-repo factory.