Fix pid test to ignore local data
Fix pid test to ignore local data

If you have lots of data stored locally, this test takes a while to
complete since it loads it all up from the users home dir.

vladlopes/influxdb,influxdb/influxdb,influxdb/influxdb,vladlopes/influxdb,benbjohnson/influxdb,mark-rushakoff/influxdb,linearb/influxdb,influxdb/influxdb,benbjohnson/influxdb,nooproblem/influxdb,influxdb/influxdb,linearb/influxdb,nooproblem/influxdb,benbjohnson/influxdb,linearb/influxdb,influxdb/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,linearb/influxdb,nooproblem/influxdb,benbjohnson/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,vladlopes/influxdb,influxdata/influxdb,influxdata/influxdb,linearb/influxdb,li-ang/influxdb,vladlopes/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb