Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 7a24bfe9681129dc7135229da151deaa3a2dc5e8
  - Merge "Improve dockerfile for Centos7"
  - Improve dockerfile for Centos7
    
    All packages are upgraded and '/run' volume is
    being created.
    
    Change-Id: I9a7056cf4615932b322c1c5b073ab60787ac54e0
    Issue-ID: OOM-1774
    Signed-off-by:  Bartek Grzybowski <b.grzybowski@partner.samsung.com>
    
diff --git a/docs/submodules/oom/offline-installer.git b/docs/submodules/oom/offline-installer.git
index 2aff0c9..7a24bfe 160000
--- a/docs/submodules/oom/offline-installer.git
+++ b/docs/submodules/oom/offline-installer.git
@@ -1 +1 @@
-Subproject commit 2aff0c9b98e318977d0b3c675ba286c8153911e3
+Subproject commit 7a24bfe9681129dc7135229da151deaa3a2dc5e8