Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 48a1c64298a90ae5404bf4df2b967cef3e8807e1
  - Merge "nullpointer in vnfadaptervfmoduleobjectmapper"
  - nullpointer in vnfadaptervfmoduleobjectmapper

    Added code block to throw exception when we get a 'Name' wthout a
    'Value' tag in the SDNC vf-module-topology. Right now we are seeing
    oam0_net_id is missing a value tag. Added Unit test to test this code
    change.

    Change-Id: I765d5a4eb9d351b7613d4c3561a2a5dbe37e4781
    Issue-ID: SO-2031
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>