[unmaintained] Disabling failing tests

This patch is disabling a set of jobs that are permanently failing in
the Zed and Yoga branches. List of tests:
* StatelessNetworkSecGroupIPv4Test.test_connectivity_between_vms_using_different_sec_groups
* StatelessNetworkSecGroupIPv4Test.test_packets_of_any_connection_state_can_reach_dest
* VlanTransparencyTest.test_vlan_transparent_allowed_address_pairs
* VlanTransparencyTest.test_vlan_transparent_port_sec_disabled

Related-Bug: #2082070
Change-Id: I8a6acb117078e75f19091f1c5533aa4a9073d96b
2 files changed