format-stress-ppc-zseries-test failed on ~ Ubuntu 18.04 zSeries

Host: ubuntu1804-z-5.dallasisv.build.10gen.cc
Project: WiredTiger (develop)
Commit: diff: WT-6672 Don't increase the writegen number until RTS cleans up checkp… (#6115)

• WT-6672 Don't increase the writegen number until RTS cleans up checkpoint

• s_all fixed

• Addressed review comments

• Update base_write_gen instead of initializing it again

• Updated comments and s_all fixed

• Addressed review comments

• Removed closing the dhandles and cursors of opened files after RTS

• Remove updating the base write gen as part of recovery_setup_file

• Set txn id to NONE when called from recovery and set btree write generation numbers of all open dhandles

• Update the runtime write gen and don't let the base write gen go
  backwards. After rollback to stable, our write_gen may be ahead of the
  connection-wide base write gen. In that case it doesn't make sense to
  move it back.

• Fix s_all.

• Clear cell txnids during recovery.

• Initialise the base write generation before rollback to stable in
  addition to after the recovery checkpoint.

• Updated comments

Co-authored-by: Alex Cameron <alex.cameron@10gen.com> | 18 Nov 20 11:58 UTC
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