. revno: 4167.1.6
    revision-id: alfranio.correia@oracle.com-20120804165626-s6lvgo59aa469o1h

  . revno: 4167.1.3
    revision-id: alfranio.correia@oracle.com-20120803190050-lhyxo6wmgkipq6dv

  . revno: 4138.1.1
    revision-id: alfranio.correia@oracle.com-20120731141810-b2405od5xnk017rl

Backported BUG 13804728 from trunk to 5.6.
------------------------------------------

This patch is based on the patch for BUG 12334346 which was not
pushed.

The type of the worker's repository is dictated by the coordinator, i.e.
the relay log info's repository. So when the latter is changed the
former is supposed to be automatically changed too.

However, due to a bug this was not happening making replication fail.
It turns out though that the worker's repository cannot be changed
if there are gaps because this requires to read information from one
repository and write it to another and this may cause problems for
the bitmap allocated to keep track of gaps.

In a...