validation: packet: increase test pool size
validation: packet: increase test pool size

Previously packet_test_concatsplit() could fail on some pool
implementations as the pool ran out of buffers. Increase default pools size
and use capability to make sure the value is valid.

Signed-off-by: Matias Elo <62402263e8617147f0e4dd5b7f6f8ec67f2b3d2c@nokia.com>
Reviewed-by: Balakrishna Garapati <301897b3eea1c167e948ff27d3ac77a8ca25d887@linaro.org>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

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