Complete the container opnfv-vnf

Complete the container opnfv-vnf

It adds the following testcases:
  - aaa
  - orchestra_openims
  - orchestra_clearwaterims

opera_vims is not yet integrated as it depends on Opera [1] and its
package must be fixed before being installed in Functest [2].

vyos_vrouter will be added when a package is available for installing
opnfv-functest-vrouter [3].

[1] https://wiki.opnfv.org/display/OPERA/Opera+Home
[2] https://git.opnfv.org/opera/tree/requirements.txt
[3] https://github.com/oolorg/opnfv-functest-vrouter

Change-Id: Iccd4626ec29c1e9eb1c2accc81fdf1a9ae1e613f
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>