Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 4f7bf1c03c5e8ceb1c46d578696e2e90b369c469
  - Include etcd storage configuration task in testing

    It was missing since adding feature for etcd storage configuration
    in https://gerrit.onap.org/r/c/oom/offline-installer/+/94135

    Change-Id: I1d354af1fd48df8cb8de002f473d32cd5d4f9075
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
    Issue-ID: OOM-2259

diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 593d936..4f7bf1c 160000 (submodule)
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 593d936bfe90f2a23a56a95e189f042c594c135c
+Subproject commit 4f7bf1c03c5e8ceb1c46d578696e2e90b369c469