Update git submodules

Update git submodules

* Update docs/submodules/aaf/authz.git from branch 'master'
  to 81fcd578060ec8f593a2bdfde3aca6bb981cb8c5
  - Merge "Remove the declaration of thrown exception 'java.io.IOException', as it cannot be thrown from constructor's body"
  - Remove the declaration of thrown exception 'java.io.IOException', as it cannot be thrown from constructor's body

    Remove the declaration of thrown exception 'java.io.IOException'

    Issue-ID: AAF-876
    Change-Id: I03248a1d359f34a701f31586029d0768083ca591
    Signed-off-by: Thugutla sailakshmi <tsaila10@in.ibm.com>