Fix deadlock in controller / application startup code.
Fix deadlock in controller / application startup code.

- Add another hand shake between the controller and the application.
- Add calls to geopm_signal_handler_check() in all Profile spin loops.
- Use only PMPI_Barrier() in profile start up code.

Change-Id: I4b2c6a6536213ff4c643fc1eab09414bf5c55d7a
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,sssylvester/geopm,sssylvester/geopm,geopm/geopm,sssylvester/geopm,geopm/geopm,cmcantalupo/geopm,sssylvester/geopm