c9a8c0b957
Without explicitly closing and disposing the connections can linger in a non-deterministic fashion and cause intermittent "too many connection" errors in the tests. These changes were diagnosed and then tested by lowering test concurrency to 1 and lowering available postgres connections to 10 and forcing the problem early in the test run. Change-Id: I8badf2a3094f2d27d381bd178c6d579f2a5c5ffe