Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Refactored SNAPS tests to take in the actual OSCreds object.

    The code previously had individual parameters for different
    aspects of the credentials. This change not only makes the
    method calls easier, but it also helps the logs from becoming
    too verbose as each test case was instantiating its own OSCreds
    instance.

    JIRA: SNAPS-23

    Change-Id: I8860e7329b9ec59d78e5977af74f4d3073496f24
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>