The value of tmnxMobSgwGaStatOperState indicates the current
operational state of this group. The operational state may be one of:
'up' - connection goes 'up' and is used by the Ga module to send
Charging Data Records (CDRs).
'down' - connection goes 'down' and is used by the Ga module to send
Charging Data Records (CDRs).
'active' - connection is 'active' and is used by the Ga module to send
Charging Data Records (CDRs).