avoid returning with partially constructed PrivateClient, causing segmentation fault during destruction
avoid return partical constructed PrivateClient during LogIn
Changed CMake variable from MaidsafeTesting to INCLUDE_TESTS.
Merge pull request #3 from maqi/MAID-36_PrivateClientTest.FUNC_CreateDuplicateAccount

MAID-36 avoid returning with partially constructed PrivateClient
Merge pull request #6 from Fraser999/MAID-460

Changed CMake variable from MaidsafeTesting to INCLUDE_TESTS.