Merge branch 'dev' into 'master'

...t/java/NTNU/IDATT1002/repository/ImageRepositoryTest.java

...t/java/NTNU/IDATT1002/repository/LoginRepositoryTest.java

...ava/NTNU/IDATT1002/repository/MetadataRepositoryTest.java

...est/java/NTNU/IDATT1002/repository/TagRepositoryTest.java

...st/java/NTNU/IDATT1002/repository/UserRepositoryTest.java

src/test/java/NTNU/IDATT1002/service/AlbumServiceTest.java

src/test/java/NTNU/IDATT1002/service/ImageServiceTest.java

src/test/java/NTNU/IDATT1002/service/TagServiceTest.java

src/test/java/NTNU/IDATT1002/service/UserServiceTest.java

src/test/java/NTNU/IDATT1002/utils/AuthenticationTest.java

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

...ava/NTNU/IDATT1002/utils/MetadataStringFormatterTest.java

src/test/java/NTNU/IDATT1002/utils/PdfDocumentTest.java

src/test/resources/Images/pb.jpg

src/test/resources/Images/plsWork.jpg

src/test/resources/META-INF/persistence.xml