PORT LATENCY

Summary: This is a performance test suite to measure the time it takes ONOS 
        to recognize a port going down and up.

Pre-requisites: To run out-of-the box this test requires 7 NODES. 
    OC1->OC7 must be set before initiating the test. Passwordless login 
    must be set from TestStation "sdn" root user. The 7 NODES must have
    their clocks synced to TestStation via ptpd and be accurate to the 
    millisecond. You will also need the Wireshark disector to see openflow packets.

***If you wish to run this test with less than 7 nodes the following 
    alterations must be made:

NOTE: Only scale sizes 1,3,5 and 7 will be functional

--In the .params, remove any values in the comma separated list in the 
    <scale> tag that are above your desired cluster size. 

--In the .params file remove one instance of “1,2” from the <testcases> 
    tag for each value you removed from <scale> (case 1 and 2 are each 
    called once for each scale value)

--In the .params file, change the value in the <max> tag to your 
    desired scale size (1,3, or 5)

--In the .topo file, change the <ONOSbench/COMPONENTS/nodes> tag to your 
    desired scale size 

--Also in the .topo file, you will need to remove all unneeded <ONOS X 
    cli> tags and their contents