The value of tFilterRSTCommunity is the SNMPv1 or SNMPv2c Community
String or the SNMPv3 Context Name used to conduct this SNMP test as
described in RFC2571 and RFC2737.
When the value of tFilterRSTSNMPVersion is 'snmpv1' or 'snmpv2c'
this object represents a community string. When the value of
tFilterRSTSNMPVersion is 'snmpv3' this object represents a SNMPv3
context name.
The value of this object can only be changed if the object
tFilterRSTOID is changed at the same time.