Update git submodules

Update git submodules

* Update docs/submodules/apex from branch 'stable/fraser'
  - Fix functional issues after nosdn deployment

    After deploying with nosdn, it looks like there is some out of state
    issue between the services.  First guess looks like something is going
    on with the services and timing of registering to each other through
    rabbit.  Simply restarting the services seems to sync them back up
    correctly.

    Change-Id: I417911067c841725ee12eb9354e5759054724e01
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit fc3f52862e181967e861eb8bce4604ac47c176ac)

  - Merge "Fixes deleting security group in SNAPS for ODL scenarios" into stable/fraser
  - Merge "Fixes delorean repo update on undercloud" into stable/fraser
  - Fixes delorean repo update on undercloud

    Previous fix to update delorean repo on undercloud was always failing
    because the operations passed to virt-customize were not in a list type.

    JIRA: APEX-565

    Change-Id: Ic883309ac1c3aa6027dc252635e404e5355c269d
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit 3812d0987d078a8a0ad93724e8188994b7579e50)

  - Fixes deleting security group in SNAPS for ODL scenarios

    Sometimes API check was failing for ODL scenarios on security group
    deletes.  This patch backports a fix from upstream to fix the issue:

    https://review.openstack.org/#/c/538352/4

    JIRA: APEX-586

    Change-Id: I36a3547228cdcb1883140f17de7b5a713298d366
    Signed-off-by: Tim Rozet <trozet@redhat.com>
  - Freeze overcloud/undercloud images for Fraser release

    Images are latest built on 3/25

    Change-Id: If0d6e190ce65f0c9cac3c0056848d589db9c68dc
    Signed-off-by: Tim Rozet <trozet@redhat.com>
  - Fixes relative import for utils

    opnfv-pyutil was not working due to this relative import.  The script
    would only work out of the pwd.

    Change-Id: I1ed5db779dd031d019012a814b2dfe27944a2e2f
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit c8f07fda6445b9b3b1fcb9d97f05cd40fffe8daf)

  - Fixes log location for pyutils

    Change-Id: I03cda65f58753fc5d55ea4ede78f7d5bd8b7bdce
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit 4d537d8b9edf67057cc28656583bbfb7dd489779)

  - Adds the ability to fetch logs from deployment

    Usage:
    opnfv-pyutil --fetch-logs
    python3 utils.py --fetch-logs --lib-dir ../lib

    Eventually all utils.sh functions will be migrated here.
    Note there is no support here for containers.  Will be
    added later.

    Change-Id: I223b8592ad09e0370e287ee2801072db31f9aa12
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit 382fa452e0c9a8189911f615416e1b24badaf5e4)