Comprehensive OVN4NFV connectivity tests

Tests should be automated and include:

• Ping/HTTP from POD to POD in the same node.
• Ping/HTTP from POD of node1 to POD of node2.
• Ping/HTTP from POD to Service (which is implemented) by POD2 - Both PODs are on the same node.
• Ping/HTTP form CLient POD to service POD which in some other node.
• Ping/HTTP from POD to Node IP of the same node.
• Ping/HTTP from POD to Node IP of different node.
• Ping/HTTP from POD to Internet
• Ping /HTTP from Internet client to service POD.