Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 1bfd41937210685fb9a9ac318d124f16acdbe274
  - Merge "Simplify Centos Dockerfile for Molecule"
  - Simplify Centos Dockerfile for Molecule

    Base the Centos image for molecule on official
    CentOS systemd docker container.

    Align the tagging policy with Centos images
    on docker hub.

    Change-Id: Ia2743ab78faed858dc5a7f3611cffb779b23d463
    Issue-ID: OOM-1774
    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 171c3dc..1bfd419 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 171c3dc7dd5a9cdc25651812dc716174c38d5f06
+Subproject commit 1bfd41937210685fb9a9ac318d124f16acdbe274