cbbackup tap id should not be random

When cbbackup creates a tap connection it uses a random string id which show up in the memached log as this:

Sat Mar 29 03:40:02.440444 EDT 3: (Ab) TAP (Producer) eq_tapq:iVksPaNTKxMERmht - Schedule the backfill for vbucket 5

From a support point of view it would be better if the random string was replaced with cbbackup or cbt (cbtools) and if space allows the hostname of the client that created the tap connection.

ideal if the spec allows:

Sat Mar 29 03:40:02.440444 EDT 3: (Ab) TAP (Producer) eq_tapq:cbbackup_patrick-laptop - Schedule the backfill for vbucket 5