test: l2fwd: add group option
test: l2fwd: add group option

User may give number of scheduling groups to test
scheduler performance with other that the default (all
threads) group. Both pktios and threads are allocated
into these groups with round robin. The number of groups
may not exceed number of pktios or worker threads.

Signed-off-by: Petri Savolainen <d528fd253b9aaf78fa72edbcc6249e82047f6ce6@linaro.org>
Reviewed-and-tested-by: Carl Wallén <ea450ba2a1b89616550a73438eb8e72c099cfe19@nokia.com>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

dkrot/odp,dkrot/odp,dkrot/odp,dkrot/odp