Implemented f_getIutLongPosVector in using new function

f_acGetLongPosVector which retrieves the info from received beacons.
Introduced new AcGNEvent and AcGNResult to handle the request.
Added mapping of ac port.
Restructured confXXUp functions to initialize the IUT before trying to get the beacon's long position vector.
Removed prInitialState from testcases as it is done now in the confXXUp functions.