PIG-4965: Refactor test/perf/pigmix/bin/runpigmix.pl to delete the output of single test case if we enable cleanup_after_test
PIG-4965: Refactor test/perf/pigmix/bin/runpigmix.pl to delete the output of single test case if we enable cleanup_after_test

git-svn-id: d317905e1b1233abb7022f5914f79c3119e04b87@1755521 13f79535-47bb-0310-9956-ffa450edef68

kellyzly/pig,kellyzly/pig,kellyzly/pig,kellyzly/pig,kellyzly/pig,kellyzly/pig,kellyzly/pig