test: take test names from command line

test: take test names from command line

While having the ability to run a test based off the DPDK_TEST
environment variable is useful, it's sometimes more convenient to
specify the test name as a commandline parameter to a test binary.
This patch adds support for checking all parameters after the EAL ones, and
running all valid autotests requested - either from DPDK_TEST or on the
commandline. This also allows multiple tests to be run in a single
automated session, which is useful for working with components which have
multiple test suites.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Aaron Conole <aconole@redhat.com>