Fixed keyword error for meta term resource transfer

[Fixes #69565910]
#fix `find_or_create_by_foo` to `find_or_create_by(:foo)`
(Deprecated in Rails4)
Extract common steps wrt spec/features/search
Revert rspec version (get rid of warnings for now)
Add test for transferring terms and then searching for them
Refactored transfer in controller, search seems not to work yet
Reindex affected media-resources after transfer
Add migration to reindex media_resources
Admin interface: metadatum string settings
Add 'usage term' secion in admin panel, add ability to reset usage-terms accepted date
Add feature test "usage-terms" to test specification
Add counts to search results
Fix group and user forms, extend and adjust feature tests
Add links to search for media elements with person's fullname
Reimplement with rspec and stabilize filter_set feature tests
Fix method not found error_user_unauthorized problem
Allow boolean types in meta_data comparison
Perform comparison if unknown meta-data type; log a warn message
Set stable version to 2.0.6
Add note to create with user form