Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to a19df9c35160639b6f81cf1fe5d3902dacbc79e7
  - Merge changes from topic "collector"

    * changes:
      Fixing bug in docker-images-collector.sh
      Add comment to automatically generated docker list
      Remove tag parameter from docker-image-collector.sh

  - Fixing bug in docker-images-collector.sh

    Some images from oom/kubernetes/common/ were not correctly collected
    by creating_data/docker-images-collector.sh script

    Issue-ID: OOM-1886

    Change-Id: I044ca8a26353da44cd6f8e94fcb822570c954b49
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>
  - Add comment to automatically generated docker list

    Add comment to docker image list generated by docker-images-collector.sh
    to reffer to commit id in case of ONAP or to project in other cases

    Issue-ID: OOM-1884

    Change-Id: I7ff32fae84db3476495eb2e560c3bf61e41e2ddb
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>
  - Remove tag parameter from docker-image-collector.sh

    Removing tag parameter from docker-image-collector.sh as it's not
    necessary as described in OOM-1881

    Issue-ID: OOM-1885

    Change-Id: Id83b396c4b994cfa659c518e3f03e704a84d65f0
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 82052dd..a19df9c 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 82052ddde7b2896c05c7b930d8e09d582025f0b3
+Subproject commit a19df9c35160639b6f81cf1fe5d3902dacbc79e7