Problem: The above test attempts to perform crash recovery. If a checkpoint does not
occurs during the time frame where we want to generate redo log records, the test runs.
However, if a checkpoint occurs, the test skips because in that case we cannot test the
recovery.

Due to the above behaviour, the test sometimes run and sometimes skip on PB2.

Fix: The fix enables the global debug variable innodb_master_thread_disabled_debug=1.
This ensures the test always runs. In case, this debug variable is not set by the server
because of some reasons, we have made changes in the test so that the test exits instead
of a skip. This will notify us when the test is failing.

Reviewed by: Satya Bodapati <satya.bodapati@oracle.com>
RB: 13563