Update git submodules

* Update docs/submodules/aai/esr-server.git from branch 'master'
  to f1f34f99b05134035f02854f15131c1132dd4f31
  - Update css file name in conf.py
    
    ribbon.css is the correct name of the css file.
    
    Issue-ID: CIMAN-376
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: If3bce090f91548c04f69c3fd824644cd8cbcf547
    
1 file changed