Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 6775daacb755361e6c558f0ea215650f4a96bfd8
  - Sonar- Unused Import

    The imports part of a file should be handled by the Integrated Development Environment (IDE), not manually by the developer.

    Unused and useless imports should not occur if that is the case.

    Issue-ID: APPC-1677
    Change-Id: Ieb7f01df8fc1f639c232ca47eefa2145fe45d965
    Signed-off-by: anushadasari <danush10@in.ibm.com>

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index aa00718..6775daa 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit aa0071848512c5570b6f218514716ace958ec7a8
+Subproject commit 6775daacb755361e6c558f0ea215650f4a96bfd8