[SDC] Certify only when needed

[SDC] Certify only when needed

1) checkin and onboard only if the tests is not already distributed
if the service is distributed, we assume that it is a replay of the test
and we do not need to re-onboard the service done during the first
steps.
It shall be then possible to replay
- basic_network
- basic_vm
- basic_cnf
- basic_pnf
- basic_clamp

2) include a replay of certify in case of resource not found

Issue-ID: TEST-315

Signed-off-by: morganrol <morgan.richomme@orange.com>
Change-Id: I04289311429c55d0e79220b0985c6a2f53d24bf1