Rename sig_network_feature -> sig_network_features
It also takes into account the last results (SCTP seems falky):
https://build.opnfv.org/ci/job/functest-kubernetes-opnfv-functest-kubernetes-smoke-latest-sig_network-run/1/console
https://build.opnfv.org/ci/job/functest-kubernetes-opnfv-functest-kubernetes-smoke-latest-sig_network_feature-run/3/console
https://build.opnfv.org/ci/job/functest-kubernetes-opnfv-functest-kubernetes-smoke-latest-sig_storage-run/1/console
Change-Id: I7d4b11462da33d20fd5ed00d870f1099b70f437b
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>