Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 37a3bbf542f8e5cd07338855b9ac3a90eb5f124e
  - Handled interrupted exception sonar fix
    
    Sonar fix
    
    Issue-ID: APPC-1517
    Change-Id: I0a9fb64812c84963b08a53b09358f598d96eb014
    Signed-off-by: Jegadeesh Babu <jegabab1@in.ibm.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 5d185ed..37a3bbf 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 5d185ed733c897df1e5d51285b5941a780fe6520
+Subproject commit 37a3bbf542f8e5cd07338855b9ac3a90eb5f124e