test/event: add unit tests for periodic timer
test/event: add unit tests for periodic timer

Add tests to arm and cancel periodic timer.

Signed-off-by: Shijith Thotton <fb3ad4b6544cf25e06da43852101567c08a915dd@marvell.com>
Acked-by: Erik Gabriel Carrillo <e875827104151a044027635d030c91d145f99619@intel.com>
Acked-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk