Update git submodules

Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 116c26e1c243f26258558148e9f69e42b3787367
  - Rewrite of `certifyToscaElement` to remove NPE

    - Modularized `certifyToscaElement` in smaller, less complex methods (`handleRelationsBeforeCertifyingAndProcessClone`, `cloneToscaElementAndHandleRelations`, `handleRelationsOfNewestCertifiedToscaElementAndReturn` & `logDebugMessageAndReturnStorageOperationStatus`)
    - Removed potential NPE flagged by Sonar in `certifyToscaElement`

    Issue-ID: SDC-2966
    Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
    Change-Id: Id65871cbfd611abdcc878e61c1541f01ff972828