Change Log:
1. Added Unsigned32 and Integer32 to IMPORTS
2. Removed TEXTUAL-CONVENTION from IMPORTS
3. Corrected 4 digit date code defined in RFC2578
4. heOpSwitchWaitToRestoreTime is changed to Integer32
instead of INTEGER
5. Removed extra commas in heOpSwitchUnitMandatoryGroup,
heOpSwitchUnitGroup and heOpSwitchInputGroup
6. Changed OID of heOpSwitchMIBCompliances to 1 instead of 2
7. Changed the text description of SNMPv2 to SNMP for
heOpSwitchBasicCompliance MODULE-COMPLIANCE