Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Dynamically skip neutron_trunk and barbican

    It avoids fasly testcases in failure for end users.
    It also removes the neutron_trunk class which is now useless (Queens).

    Change-Id: I3f5a1ac84a50e061da6eadcc5c9bafb2e99050db
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Typo

    Change-Id: I55064f83d2a97eaae2a2861d4451ae34e547c40c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Include neutron_tempest_plugin in tempest-[smoke,full]

    Change-Id: I19f9a6ff2f76a4684bf341b2f22ffc4d09dca1cc
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Leverage on Xtesting 0.53

    It allows dynamically skipping test cases.

    Change-Id: Ida82e76478316fce61dd59dd206e1c03943b084a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>