Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 267c00c92281e147d1dc14f4630204c3927f9f59
  - Merge "Javadoc and logging improvement"
  - Javadoc and logging improvement

    Added Javadocs for VnfAdapterVfModuleResources and
    VnfTopologyOperationRequestMapper classes

    Issue-ID: SO-2052
    Signed-off-by: sunilb <sb00577584@techmahindra.com>
    Change-Id: Iec6addb415720f63c32b5ab99e63aefe0ef3235a