refs #8028 - provide server apidoc for hammer deletionrecord, BZ 1155642

@ehelms @komidore64 The deletion record is just a uuid that allows candlepin to respond to rhsm requests (ie. consumers checking in) w/ 410-gone responses. Its existence does not prevent consumers from re-registering, etc. Since virt-who is using the registered host's credentials for communication (ie. virt-who is acting like rhsm), it should be allowed to perform consumer-ish things. One of those things is, I think, removing deletion records.

As for which users should be allowed, pick a sensible set of permission types to test the user for. Perhaps ability to register content hosts is enough. Refining filters on that permission do not need to be take into consideration, imo.