journal: make "repository:" filtering condition work as expected (Issue #261)
admin: apply LOWER() on journal filtering term for suffix/infix matching
indexers: use correct full repository name, which contains group name, at indexing
search: prevent username related conditions from removing "stop words"
search: prevent pathname related conditions from removing "stop words"
search: make "repository:" condition work case-insensitively as expected
search: make "repository:" condition work as expected
journal: make "username:" filtering condition work as expected