Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 5950fd75a7e3be99f8d0ab7caac9a0bed267387e
  - Update kubectl and helm binaries

    kubectl and helm binaries need to be updated for proper usage with Dublin release

    kubectl: v1.13.5
    helm: v2.12.3

    Issue-ID: OOM-1858

    Change-Id: I824362c8321317cbf0601ae2bd15ff39ef5c807e
    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 6f6a812..5950fd7 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 6f6a8122eecccd9d821b75cf96c02b53455838b1
+Subproject commit 5950fd75a7e3be99f8d0ab7caac9a0bed267387e