8085814: Move stream test library to the jdk test library area
8173414: Some testng tests check nothing in java util stream
Reviewed-by: psandoz

8023897: Replace/update/rename executeAndCatch in various tests to assertThrows
Reviewed-by: dfuchs, prappo, psandoz, rriggs

8174171: Move spliterator testing of BitSet into big memory tests BitSetStreamTest
Reviewed-by: mli, psandoz