app/testpmd: allow TM hierarchy commit on running port

Some drivers might allow to commit the traffic management hierarchy
while being in running state. Therefore, removes port status check
before invoking hierarchy commit API in the cli. If needed, device can
add port status check at the driver layer.

Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>