Prepare Functest euphrates containers

Prepare Functest euphrates containers

They depend on git commit ids for the next OPNFV projects:
  - releng [1]
  - securityscanning

Securityscanning should be first removed in master and then the patch
will be cherry-picked in stable/euphrates. A temporarily git commit
id is used here to allow building the containers before that changes.

[1] https://lists.opnfv.org/pipermail/opnfv-tech-discuss/2017-September/017865.html

Change-Id: Ib7bd4206a6ef7f5bb8cd58f324d3e437a3b704a1
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>