Update git submodules

Update git submodules

* Update docs/submodules/auto from branch 'stable/fraser'
  - Merge "User Guide April 13th update, for Fraser MS9" into stable/fraser
  - 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>
    (cherry picked from commit 56002f18fbac67bcdd197e04689414b25c830ddc)