FAILURES DURING BINLOG ROTATION

Analysis:
========
In case of hardware errors in binlog partition during binlog
rotate, we can see the following error being reported.

[ERROR] The server was unable to create a new log file. An
incident event has been written to the binary log which will
stop the slaves.
[ERROR] Can't generate a unique log-filename
master-bin.(1-999)

All replicas break either due to seeing incident event or
simply because the dump thread cannot access binlog
partition. binlog_error_action was developed for these
purposes (i,e; to avoid server accepting writes even though
binlog writes are failing), but it doesn't handle the above
case.

Fix:
===
An error handler has been added in such a way that, on
hardware failure during rotate, it will do the specific
action defined as part 'binlog_error_action' variable.
Also incident event will not be written to the binary log
in the above mentioned scenario.