Swizzle +[NSObject senIsSuperclassOfClass:]

SenTestingKit has a fairly slow implementation of testing
whether one class is a superclass of another:
http://www.quantum-step.com/download/sources/mystep/OCUnit/SourceCode/SenTestingKit/NSObject_SenTestRuntimeUtilities.m

This adds a swizzle for that method that speeds up otest-shim.
Use SenIsSuperclassOfClassPerformanceFix in otest-query

otest-query uses SenTestingKit's API for determing which test cases
exist, so the +senIsSuperclassOfClass: swizzle helps performance for
it as well.
Merge pull request #349 from facebook/swolchok/sen-is-superclass-of-class-perf

Swolchok/sen is superclass of class perf