state to the joiner
In mysqldump SST, if Galera nodes are started with --log-bin and
-log-slave-updates, the GTID sequence increases as the dump is
played on the joiner, leaving behind the donor.
This patch introduces a new mysqldump option --galera-sst-mode,
which if enabled, would
a) Add command to set off binary logging (log_bin=OFF).
b) Add command to set @@global.gtid_binlog_state to that
of donor.
This will help in keeping the GTIDs consistent post-SST across
the nodes.
* Removed the unnecessary call to wsrep_cleanup_progress_file,
which was returning code 1 and eventually causing SST to fail.
* Also initialized the unused WSREP_SST_OPT_CONF to avoid error
message.
