Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 768eac673132b08e48da7beba7062af0e7771c4c
  - Merge "Add repository for cassandra image"
  - Add repository for cassandra image
    
    Change-Id: I287b830f86da0fe0adc440cf9e645f8d244aefe1
    Issue-ID: OOM-2368
    Signed-off-by: afenner <andrew.fenner@est.tech>
    
diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index 8b6aca7..768eac6 160000
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit 8b6aca77c122a18be98ef09d5dad13493c367035
+Subproject commit 768eac673132b08e48da7beba7062af0e7771c4c