Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 3ef63f580a6fcf697c4f28ca55f27239f564dc53
  - Merge "Add role level tests for 'nginx' role"
  - Add role level tests for 'nginx' role

    Introduce full role level test coverage for
    'nginx' role.

    Change-Id: I7c634775433a2336e43cdfc73d4698d5e2933f0e
    Issue-ID: OOM-1913
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 07c27d8..3ef63f5 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 07c27d8fda62647e3a37297d8000394c3435cc5c
+Subproject commit 3ef63f580a6fcf697c4f28ca55f27239f564dc53