update: set osd flags before upgrading any mon

update: set osd flags before upgrading any mon

Typical error:

```
failed: [mon0 -> mon2] (item=noout) => changed=true
  cmd:
  - ceph
  - --cluster
  - ceph
  - osd
  - set
  - noout
  delta: '0:00:00.293756'
  end: '2019-04-17 06:31:57.552386'
  item: noout
  msg: non-zero return code
  rc: 1
  start: '2019-04-17 06:31:57.258630'
  stderr: |-
    Traceback (most recent call last):
      File "/bin/ceph", line 1222, in <module>
        retval = main()
      File "/bin/ceph", line 1146, in main
        sigdict = parse_json_funcsigs(outbuf.decode('utf-8'), 'cli')
      File "/usr/lib/python2.7/site-packages/ceph_argparse.py", line 788, in parse_json_funcsigs
        cmd['sig'] = parse_funcsig(cmd['sig'])
      File "/usr/lib/python2.7/site-packages/ceph_argparse.py", line 728, in parse_funcsig
        raise JsonFormat(s)
    ceph_argparse.JsonFormat: unknown type CephBool
  stderr_lines:
  - 'Traceback (most recent call last):'
  - '  File "/bin/ceph", line 1222, in <module>'
  - '    retval = main()'
  - '  File "/bin/ceph", line 1146, in main'
  - '    sigdict = parse_json_funcsigs(outbuf.decode(''utf-8''), ''cli'')'
  - '  File "/usr/lib/python2.7/site-packages/ceph_argparse.py", line 788, in parse_json_funcsigs'
  - '    cmd[''sig''] = parse_funcsig(cmd[''sig''])'
  - '  File "/usr/lib/python2.7/site-packages/ceph_argparse.py", line 728, in parse_funcsig'
  - '    raise JsonFormat(s)'
  - 'ceph_argparse.JsonFormat: unknown type CephBool'
  stdout: ''
  stdout_lines: <omitted>
```

Having mixed versions of monitors seems to cause this error.
Moving these tasks before any monitor gets upgraded seems to be enough
to get around this issue.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>