Correct Cassandra Website Testing page

1) test/burn - to run them, first build the uber jar with ant burn-test-jar, and then to run the tests call ant test-burn or ant burn-testsome

This is incorrect. We do not need the uber jar in order to run the tests. Also that target exists only on newer versions where we see in build.xml

 <!-- Build a self-contained jar for e.g. remote execution; not currently used for running burn tests with this build script -->

2) 
 

ant testsome -Dtest.name=<TestClassName> -Dtest.method=<testMethodName>

should be changed to

ant testsome -Dtest.name=<TestClassName> -Dtest.methods=<testMethodName>