Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to d904fc786956891946e7bd92b559fdb98f62330f
  - UserRolesController methods up

    readExternalRequestAccess(), getUserAppCatalogRoles(),
    putAppWithUserRoleRequest(), testGetRoles(),
    importRolesFromRemoteApplication(), getUsersFromAppEndpoint() up

    Issue-ID: PORTAL-710
    Change-Id: I751d5e412ec85a1a65b0b7d43a023ce6a1915d91
    Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>

diff --git a/docs/submodules/portal.git b/docs/submodules/portal.git
index df4d078..d904fc7 160000 (submodule)
--- a/docs/submodules/portal.git
+++ b/docs/submodules/portal.git
@@ -1 +1 @@
-Subproject commit df4d078a7e3bcb1d566b0f3f69108979ecaf62d0
+Subproject commit d904fc786956891946e7bd92b559fdb98f62330f