Merge branch 'test-comma-fix' into 'dev'

src/main/java/NTNU/IDATT1002/controllers/ExploreAlbums.java

src/main/java/NTNU/IDATT1002/controllers/UploadImages.java

src/main/java/NTNU/IDATT1002/models/Tag.java

src/main/java/NTNU/IDATT1002/service/ImageService.java

...test/java/NTNU/IDATT1002/utils/MetaDataExtractorTest.java