Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [noha] Disable proxy certificate generation
    
    noha scenarios try to generate the proxy SSL cert using the Salt
    Master CA authority. However, this requires a `salt-minion` restart
    between the CA configuration and the cert generation (see [1]).
    Since we don't use this cert anyway, let's just disable it for cfg01.
    
    JIRA: FUEL-377
    
    [1] salt-formulas/salt-formula-salt#67
    
    Change-Id: I8e88200e0d5614f0034c0c77e6ba675dc7ef0c11
    Signed-off-by: Alexandru Avadanii <[email protected]>