Revert "os/FileJournal: Update the journal header when closing journal"

This reverts commit 4eb18dd487da4cb621dcbecfc475fc0871b356ac.

This may be responsible for #9073.  Until that is resolved, revert.

Signed-off-by: Sage Weil <sage@redhat.com>
qa/workunits/rbd/qemu-iotests: touch common.env

This seems to be necessary on trusty.

Backport: firefly, dumpling
Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 055be68cf8e1b84287ab3631a02e89a9f3ae6cca)
0.84
Merge remote-tracking branch 'gh/next'