Cleanup: Use FOO not in BAR instead of not FOO in BAR
Cleanup: Use FOO not in BAR instead of not FOO in BAR

No functional change, but more pythonic, and makes pylint's
unneeded-not warning happy.

Signed-off-by: Brian Foley <a00e555871a6a538e97f8c44307104c884f8e869@google.com>
Reviewed-by: Federico Pareschi <ff862f58af48d157b995cd83870fbfa4aec8edf3@google.com>

onponomarev/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,yiannist/ganeti,yiannist/ganeti,yiannist/ganeti,ganeti/ganeti,onponomarev/ganeti,andir/ganeti,andir/ganeti,mbakke/ganeti,ganeti/ganeti,mbakke/ganeti