Resolve "StudentGroupCreateDTO should contain name"

Closes #95 (closed)

src/main/java/nl/tudelft/labracore/dto/create/StudentGroupCreateDTO.java

@@ -19,6 +19,7 @@ package nl.tudelft.labracore.dto.create;
 
 import java.util.List;
 
+import javax.validation.constraints.NotEmpty;
 import javax.validation.constraints.NotNull;
 
 import lombok.*;
@@ -34,6 +35,9 @@ import nl.tudelft.librador.dto.create.Create;
 @EqualsAndHashCode(callSuper = false)
 public class StudentGroupCreateDTO extends Create<StudentGroup> {
 
+	@NotEmpty
+	private String name;
+
 	private ModuleIdDTO module;
 
 	@NotNull