#601 - migrated unit test to JUnit5

pom.xml

...de/deadlocker8/budgetmaster/unit/CategoryServiceTest.java

...ava/de/deadlocker8/budgetmaster/unit/IconServiceTest.java

...java/de/deadlocker8/budgetmaster/unit/IconizableTest.java

...va/de/deadlocker8/budgetmaster/unit/ImageServiceTest.java

...udgetmaster/unit/TransactionSearchSpecificationsTest.java

...deadlocker8/budgetmaster/unit/TransactionServiceTest.java

...ker8/budgetmaster/unit/TransactionSpecificationsTest.java

...ker8/budgetmaster/unit/backup/LocalGitBackupTaskTest.java

...er8/budgetmaster/unit/backup/RemoteGitBackupTaskTest.java

...ocker8/budgetmaster/unit/database/DatabaseExportTest.java

...ocker8/budgetmaster/unit/database/DatabaseParserTest.java

...er8/budgetmaster/unit/database/DatabaseParser_v4Test.java

...er8/budgetmaster/unit/database/DatabaseParser_v5Test.java

...er8/budgetmaster/unit/database/DatabaseParser_v6Test.java

...er8/budgetmaster/unit/database/DatabaseParser_v7Test.java

...nit/database/DatabaseParser_v7_convertToInternalTest.java

...cker8/budgetmaster/unit/database/DatabaseServiceTest.java

...locker8/budgetmaster/unit/database/ImportServiceTest.java

...ker8/budgetmaster/unit/repeating/RepeatingOptionTest.java