integrate semaphore file creation removal on session start/finish

[vdelendik]

1. find place in appium sources where session created successfully, session message is generated (base-driver?)
   old logic which used it to determine startedSessionId is here:

   appium/entrypoint.sh

   Line 227 in f87be73

   startedSessionId=`grep -E -m 1 " session created successfully, session " ${TASK_LOG} | cut -d " " -f 10 | cut -d " " -f 1`

2. inject file creation $LOG_DIR/.recording-artifact with such content on this step:

sessionId=<session-uuid>

3. find place in appum sources where session is finished (TBD if we can support negative scenarios as well)
   example:

   appium/entrypoint.sh

   Line 259 in f87be73

   finishedSessionId=`grep -E -m 1 " DELETE /wd/hub/session/$startedSessionId " ${TASK_LOG} | cut -d "/" -f 5 | cut -d " " -f 1`

4. inject $LOG_DIR/.recording-artifact file removal on above step

[vdelendik]

please, start implementation using recorder-2.0 branch

[dhreben]

Basic acceptance successfully completed. Video, screenshots and logs are available.