Add sig_network_feature
It verifies a couple of features by running a subset of e2e tests:
Ingress, Networking-IPv4, Networking-Performance, PerformanceDNS, SCTP
and NoSNAT. It excludes by default NetworkPolicy, Networking-IPv6,
IPv6DualStackAlphaFeature and Example. A couple of features may be
automatically skipped like NEG and kubemci.
Change-Id: I6efac39bb99c1deb8efe8e82d976d69d6540a9d1
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
(cherry picked from commit
e0d151ccaf4b267682feec0d38e8b7de3eb3d61c)