galera_gcache_recover fails intermittently

It appears that this issue is no longer being worked on, so we are closing it for housekeeping purposes. If you believe the issue still exists, please open a new ticket after confirming it's present in the latest release.

This scenario does this
– start PXC
– do some work
– kill PXC
– run PXC with --wsrep-recover
– write out new grastate.dat
– startup PXC

however, when killing PXC, sometimes innodb gets interrupted when writing the transaction. In the wsrep-recover stage, innodb rolls back the transaction. But when node2 tries to get the transaction, it's not there, so we do an SST instead of an IST.