Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to 6a9580d025114106e82fc49da895bbc857a3e91b
  - ONAPWelcomeController sonar issue fix

    String viewName and getter/setter can be romoved from his class.
    ONAPWelcomeController Overrides this field 1 to 1.

    Issue-ID: PORTAL-652
    Change-Id: Idbb41f52a63c6ea681f6ba7753991d766849e3a2
    Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>

diff --git a/docs/submodules/portal.git b/docs/submodules/portal.git
index caf5dec..6a9580d 160000 (submodule)
--- a/docs/submodules/portal.git
+++ b/docs/submodules/portal.git
@@ -1 +1 @@
-Subproject commit caf5dec3f7ddb89fc26b7579e5d7f15ac54e500c
+Subproject commit 6a9580d025114106e82fc49da895bbc857a3e91b