Update git submodules

Update git submodules

* Update docs/submodules/integration/test from branch 'master'
  to b47a552b8a93b62cc8c3672938c7aa9750ac8dc2
  - Add peer group configuration

    Add configuration of peer-group as template
    for all the neighbors which are using
    the same attributes.

    Makes setting all the neighbors less
    verbose, especially in the case when we
    are reconfiguring 600 neighbors, and tests
    new functionality.

    Change-Id: Ice5fdff48d74c2745a7e12b881ba38ae15ad6f77
    Signed-off-by: Tomas Markovic <tomas.markovic@pantheon.tech>