Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to 97a7ae6735326720f78067a8996b6b6ae07ddc48
  - Merge "Fix Sonar Bugs NullPointers"
  - Fix Sonar Bugs NullPointers

    Fix Sonar bugs - potential NullPointerException in portal-BE-common:
    ExternalAppsRestfulController and ApplicationRestClientServiceImpl
    Changed Tests for updated method in ExternalAppsRestfulController
    Added new test
    Formatted according to ONAP formatting guidelines

    Change-Id: I7c0587127e32ba3f06a138a0b4b2526fa10ea1f6
    Issue-ID: PORTAL-556
    Signed-off-by: k.kazak <k.kazak@samsung.com>

diff --git a/docs/submodules/portal.git b/docs/submodules/portal.git
index 729f461..97a7ae6 160000 (submodule)
--- a/docs/submodules/portal.git
+++ b/docs/submodules/portal.git
@@ -1 +1 @@
-Subproject commit 729f4611202be657c7672aa92ec70844cafffede
+Subproject commit 97a7ae6735326720f78067a8996b6b6ae07ddc48