Merge pull request #18 from collectionspace/CSPACE-5024

CSPACE-5024: Added support in services to search across all vocabs of a given authority type. Only supports search, but supports all forms (keyword, partial term, advanced search). Callers must pass "_ALL_" as the parent specifier to access this. E.g. http://localhost:8180/cspace-services/personauthorities/_ALL_/items/?pt=joe  Client tests are included in the IntegrationTests module. All tests of this new functionality, as well as all services tests, pass.