Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to c8601f0659f90fc2ca390de6d5d7682d1af190f0
  - Merge "Remove cleanup-rancher test role"
  - Remove cleanup-rancher test role
    
    This role is not used by rancher tests anymore.
    
    Issue-ID: OOM-1902
    Change-Id: I989c41dfbf6dec8054befad87ac367bbf1afbc02
    Signed-off-by: Michal Zegan <m.zegan@samsung.com>
    
diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 5930a9e..c8601f0 160000
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 5930a9e5a262c0c84833bcf33b3533e603b28f9c
+Subproject commit c8601f0659f90fc2ca390de6d5d7682d1af190f0