Fix hardcoded temporary directoryAbstract: A number of tests hardcode /tmp and use it for temporary data which is not guaranteed to be writable during package builds leading to failed tests. Use the TMPDIR environment variable instead and fall back to /tmp if not set.
Disable ClientWorkerTest unit tests Several unit tests in ClientWorkerTest fail because worker.isConnected() returns false. This happens because OBEXClientWorker::process() returns prematurely after sending an OBEX CONNECT because OBEX_HandleInput() returns 0 which according to the libopenobex documentation should only happen in case of a timeout but in reality also happens in case of a EAGAIN, EINTR or EWOULDBLOCK when reading or writing to the server. In the unit tests this happens due to a race condition when the client tries to read a response from the server before it is ready. This seems to be more of an issue with libopenobex than with syncml since the OBEX_HandleInput() takes a timeout argument and is only documented to return 0 in case of exceeding that timeout.
