XCTest support for otest-query

* TestingFramework.m contains information about both frameworks
* Changed OtestQuery.m use information from TestingFramework.m
 instead of always using "SenTestCase" and "senAllSubclasses".
* Added unit tests in OTestQueryTests to check that otest-query
 gets the correct list of tests in both iOS and OSX projects
 using XCTest.