Don't set is_data_track to 1 for pregaps (MBS-7988)
Add update script for MBS-7988
Make clearer we're testing booleanness
Correct table name in Data::Statistics
Merge remote-tracking branch 'bitmap/pregap-not-data'

* bitmap/pregap-not-data:
  Make clearer we're testing booleanness
  Add update script for MBS-7988
  Don't set is_data_track to 1 for pregaps (MBS-7988)