Update git submodules

* Update docs/submodules/aai/esr-server.git from branch 'master'
  to 3981a8c28c5509e59aa6d7857183d831352ec4fa
  - Release 1.5.1 artifacts to build docker
    
    Re-upping this patchset,
    Trying to figure out why the merge option
    is not showing
    
    Issue-ID: AAI-2734
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
    Change-Id: I8ef47bb2490841eaf8579738315c5dacdab73e55
    
1 file changed