Making the testing Sqoop cascades easier

Got rid of setting MapRedHome in the Cascade
Extracting out the Database specific piece.
Providing a fixed function for data setup and cleanup
My understanding (based on the spec2 docs) is that AroundExample only works when mixed in with a specification. However, the spec2 doc is rather patchy about explaining the proper usage of these features. 

Basically, I wanted a db setup before and db cleanup after every test. AroundExample seemed to fit the bit.