harmonize mac_CellGroupConfig RRC configuration

This should also fix PHR (#564 (closed)) and SR not working in NSA. Issue found by @AlSamman.

In fill_default_secondaryCellGroup it was not working because:

NR_MAC_CellGroupConfig_t *mac_CellGroupConfig = secondaryCellGroup->mac_CellGroupConfig;
mac_CellGroupConfig=calloc(1,sizeof(*mac_CellGroupConfig));