Update git submodules

* Update docs/submodules/aai/esr-server.git from branch 'master'
  to a931fa8785545c26c285d30208c643ccd98d2654
  - Update to the 1.5.1-SNAPSHOT
    
    Issue-ID: AAI-2793
    Change-Id: Ifad707388f0dd76a27135fda2f89d16d8d9afba9
    Signed-off-by: Kajur, Harish (vk250x) <vk250x@att.com>
    
1 file changed