network: merge networktests.sh/networkstress.sh into network.sh

* invoke ltp-pan inside network.sh;
* merge tcp_cmds_additions to tcp_cmds;
* remove not used tcp_cmds_(no)expect runtest files;
* move variables default values to test_net.sh library so we
  can run network tests individually with default parameters.

All network tests can be run from a single script:
e.g. to run 'tcp_cmds' test group

ENV_VARS ./network.sh -t

It is possible to define your own runtest file with '-f' option:

ENV_VARS ./network.sh -f custom_runtest_file

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
3 files changed