Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Add/update variables to tool, user, and flavors"
  - xci: Add/update variables to tool, user, and flavors

    Updates
    - RAM allocations for the flavors mini and noha increased to 12GB.
    - Distro variables introduced to tool as it will be used by the CI and
    the developers.
    - LOG_PATH and RUN_TEMPEST are now available in user variables.

    Change-Id: I4a73d7b79761d81f605cdb3fa9771ca40e9f9f02
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>