Update git submodules

* Update docs/submodules/auto from branch 'master'
  - User Guide April 13th update, for Fraser MS9

    JIRA: AUTO-26

    Updated user guide for each Use Case:
    - UC1: minor typos
    - UC2: new figures (test logic, cardinalities), additional text
    - UC3: new figures (test cases mapped on architecture), updated
    text, aligned with updated UC3 definition

    Change-Id: I45faef95fde8eb362faffaa7469a0f2e1bcbf318
    Signed-off-by: Gerard Damm <gerard.damm@wipro.com>

diff --git a/docs/submodules/auto b/docs/submodules/auto
index c74e914..56002f1 160000 (submodule)
--- a/docs/submodules/auto
+++ b/docs/submodules/auto
@@ -1 +1 @@
-Subproject commit c74e914c628819473625c3bfd03d4535e6e64bb8
+Subproject commit 56002f18fbac67bcdd197e04689414b25c830ddc