CXX-163 Create integration target
CXX-158 Add GridFS integration tests
CXX-159 Add SASL client auth integration test
minor: exampleSourceMap formatiing
minor: scoped_db_conn_test ordering
CXX-163 improve integration target

Move integration tests and associated files under unittest directory
Move client_test_main and integration_test_main under unittest directory
CXX-163 use port parameter and renamings
CXX-163 add licenses
CXX-163 move and rename integrationTestParams
CXX-158 update GridFS tests to use new chunk size
CXX-167 Fix rogue quote character

Quote character was introduced in earler CXX-167 check-in. Not
sure how things managed to build like this, but they did.