suites/fs: add client recovery

Signed-off-by: John Spray <john.spray@redhat.com>
gitignore: ignore vim temp files

Signed-off-by: John Spray <john.spray@redhat.com>
suites/fs: add cephfs_journal_tool test

Fixes: #4886

Signed-off-by: John Spray <john.spray@redhat.com>