functional tests rationalization

• bring coherency among all functional tests:

• centralize parameters and functions that make sense
• align tests together and especially 1.2.1 and 2.2.1
• improve process management so that process are correctly killed and sims unmounted even if tests fail
• add some protection (e.g. do not start test if sample files can not be read or a sims can not be launched )

• shorten tests duration by using log parsers instead of timers
     This way, E2E can be reactivated on the gate.

All those actions will improve the global development effort efficiency (especially E2E reactivation for the dev on SH)