buildall.sh -testdata shouldn't format cluster and metastore

Otherwise it's impossible to use buildall to do an incremental data load

Change-Id: I5f601e235a0bf0de4823266f6f4d54558d886d8a
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4123
Reviewed-by: Skye Wanderman-Milne <skye@cloudera.com>
Tested-by: jenkins