Fix run info ID bug in benchmark report
Fix run info ID bug in benchmark report

Until now only one run info ID would be generated per user, but this is
not the right thing. We want one run ID per run to make it easy to
compare two different executions without relying on dates as a
distinguishing marker.

Change-Id: I9615abaae85e4647122d7236338f686e780e30c2
Reviewed-on: http://gerrit.cloudera.org:8080/434
Reviewed-by: Martin Grund <2546548d516fa64c411fde8242af35f3f80ad31f@cloudera.com>
Tested-by: Internal Jenkins

michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala