app/test: fixes to python control script
app/test: fixes to python control script

* Change behaviour to spread the memory specified across all sockets
  rather than duplicating the memory for each one. This way the memory
  size specified is the total memory needed by the test.
* Minor reordering of test cases, to ensure that ring autotest is the
  final test run.

Signed-off-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>

phermansson/dpdk,phermansson/dpdk,phermansson/dpdk,phermansson/dpdk