INFRA-18508 - svn-qavm3.a.o migration

[Daniel Shahaf]

Could someone take point from our side on the VM migration
«https://issues.apache.org/jira/browse/INFRA-18508»?  That VM runs the merge
bot, conflicts bot, and wayita.

See messages on private@ from christ@ and dfoulks@ on 2019-05-28 and 2019-05-30.