Merge dev with course enrollment without requirements
Conflicts:
src/main/java/mk/ukim/finki/molbi/model/exceptions/RequestSessionNotFoundException.java
src/main/java/mk/ukim/finki/molbi/model/exceptions/StudentNotFoundException.java
src/main/java/mk/ukim/finki/molbi/repository/RequestSessionRepository.java
src/main/java/mk/ukim/finki/molbi/service/StudentService.java
src/main/java/mk/ukim/finki/molbi/service/impl/StudentServiceImpl.java
src/main/resources/templates/fragments/footer.html
src/main/resources/templates/fragments/header.html
Closes #5 (closed)