Ticket 49546 - Fix broken snmp MIB file
Description: Converted our MIB file to be SMIv2 compliant. Also
slightly rearranged the entities to be more organized.
https://pagure.io/389-ds-base/issue/49546
Reviewed by: firstyear & nkinder (Thanks!!)
(cherry picked from commit ee62d3d57c02267123991b5ae31070d3a76e4c1b)