Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 9591bbf978d8e738143f4a94b6df7045e4074f78
  - Merge changes from topic "bin_utils"

    * changes:
      Fix tests for binaries preparation in installation steps
      Add binaries preparation to installation steps

  - Fix tests for binaries preparation in installation steps

    Change-Id: Ib28bda24b711111c13bbaf9bd2628abd2001a1a9
    Issue-ID: OOM-1925
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Add binaries preparation to installation steps

    Adding binaries preparation into installation steps as rke binary need
    to be renamed and helm binary need to be unarchived. Removing those
    previously manual steps from BuilGuide

    Issue-ID: OOM-1925

    Change-Id: I504320fb82e1c8f6db2f99c5dfd4518192eae895
    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 1dd72bd..9591bbf 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 1dd72bddf480e3af3b82ce7863d9397dc9c71003
+Subproject commit 9591bbf978d8e738143f4a94b6df7045e4074f78