fix failing test: set version path on import
rename find_with[base]path: drop 'find_'
get rid of unnecessary variable
simplify code and conform to code style guide
remove LimitsInitializer
supply rollback on migration
add documentation on the commit walker
conform to one expect per it
replace has_versions? by versions.any?

Conflicts:
	app/models/ontology/versions.rb
get rid of instance variables
fix status check
use has_versions? again, fixing error
Merge branch 'staging' into 641-git_mv_handling

Conflicts:
	Gemfile.lock
	app/models/ontology_version.rb
	config/settings.yml
	test/factories/ontology_version.rb