Testing opening of the tiff files
Get SLIDEATLAS_TEST_DATA_ROOT from environment
Testing tilesize
Fixing for missing barcode, storing barcode as string
Zeiss ptif images do not contain label and macro images
Merge branch 'test/dj-tile-reader'

* test/dj-tile-reader:
  Zeiss ptif images do not contain label and macro images
  Fixing for missing barcode, storing barcode as string
  Testing tilesize
  Get SLIDEATLAS_TEST_DATA_ROOT from environment
  Testing opening of the tiff files