Rally_jobs asks for Router in several tasks

Rally_jobs asks for Router in several tasks

NeutronNetworks.create_and_list_ports can be executed when no L3 if
the appropriate params are passed (see rally_sanity and rally_full).

As rally_jobs is an official task which shouldn't be changed, it
simply skips rally_jobs rather than
NeutronNetworks.create_and_list_ports [1]

[1] http://artifacts.opnfv.org/airship/WR7HM1BV0NA2/airship-opnfv-functest-benchmarking-latest-rally_jobs-run-184/rally_jobs/rally_jobs.html#/NeutronNetworks.create_and_list_ports

Change-Id: I9bccb7417bbd514bd213a6b103f62165de497c00
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>