Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to 7452df539af5dc90596307713c15cae7cc9bd6db
  - Merge "PortalAdmin class DB constraints"
  - PortalAdmin class DB constraints

    Java Bean Validation SR 380 annotations added to classes
    Getter/Setter changed into lombok annotation

    Issue-ID: PORTAL-641
    Change-Id: I98909f4a82372f110aa42452476fb85c9bccbf3a
    Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>

diff --git a/docs/submodules/portal.git b/docs/submodules/portal.git
index 67cd727..7452df5 160000 (submodule)
--- a/docs/submodules/portal.git
+++ b/docs/submodules/portal.git
@@ -1 +1 @@
-Subproject commit 67cd727b3eaa24964a441cb60a18b44d3710a441
+Subproject commit 7452df539af5dc90596307713c15cae7cc9bd6db