perf test READMEs

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+INTENT INSTALL/WITHDRAW LATENCY 
+
+Summary: This is a performance test designed to benchmark the 
+    latency of installing intents and withdrawing intents. (intent 
+    install and intent withdraw are separate operations with 
+    independent time data) 
+
+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 "admin" root user. 
+
+***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