Add `dig` to dnsperf image, somehow was missing
Add `dig` to dnsperf image, somehow was missing

sjug/perf-tests,shyamjvs/perf-tests,kubernetes/perf-tests,sjug/perf-tests,sjug/perf-tests,kubernetes/perf-tests,shyamjvs/perf-tests,shyamjvs/perf-tests,kubernetes/perf-tests,shyamjvs/perf-tests,sjug/perf-tests,gmarek/perf-tests,gmarek/perf-tests,kubernetes/perf-tests,kubernetes/perf-tests,shyamjvs/perf-tests,sjug/perf-tests,gmarek/perf-tests