Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 761567ec1de6e322c419f47f00a66a691f58a7af
  - Merge "openstack inventory capture"
  - openstack inventory capture

    Begin heatbridge refactor
    initial check in of heatbridge
    Additional commits of heatbridge
    Update Heat bridge to write more AAI data
    Update to utlize HeatBrdige to populate AAI
    Adjust simulator endpoints to work again
    Remove not needed BB Test case, fix tc
    Refactor how AAI relationships are being built

    Issue-ID: SO-2777
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: Iffccc24e18b278188c3fe98bcb1ad9685229d0a2