Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to b86dfe843f17915af50746ef28bdeef7be700780
  - Merge "Add role level tests for 'vncserver' role"
  - Add role level tests for 'vncserver' role

    A cleanup stage is also added to clean testing
    artifacts.

    Change-Id: I2255a0e90a0f609bd927d3d44dd05b5847fbdfb0
    Issue-ID: OOM-1926
    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 f2f0670..b86dfe8 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit f2f06700b7b9ad99c9c182fc01ee5cc0782ead78
+Subproject commit b86dfe843f17915af50746ef28bdeef7be700780