Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to b288b7ab24f33af72e9c0fedecbb9979d1b4afc7
  - Refactor flow of cert files generation, based on OUTPUT_TYPE parameter

    -Add artifacts creator provider (strategy pattern)
    -Refactor KeystoreTruststoreCreator
    -Add new exception: CertOutputTypeNotSupported
    -Change Unit tests

    Issue-ID: AAF-1152
    Signed-off-by: Tomasz Wrobel <tomasz.wrobel@nokia.com>
    Change-Id: If2b2fa50d551e72f19319d781bfb6079d07c7b83

diff --git a/docs/submodules/aaf/certservice.git b/docs/submodules/aaf/certservice.git
index 1a89062..b288b7a 160000 (submodule)
--- a/docs/submodules/aaf/certservice.git
+++ b/docs/submodules/aaf/certservice.git
@@ -1 +1 @@
-Subproject commit 1a890623eff92322a033943ba8e46d2e33b9c2c5
+Subproject commit b288b7ab24f33af72e9c0fedecbb9979d1b4afc7