Reverted change to entity name due to database naming conflicts

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/Group.java

@@ -20,7 +20,7 @@ import lombok.NoArgsConstructor;
 @NoArgsConstructor
 @AllArgsConstructor
 @Builder
-@Entity(name = "group")
+@Entity(name = "groups")
 @Data
 public class Group {
 

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/user/User.java

@@ -28,7 +28,7 @@ import java.util.List;
 @Data
 @NoArgsConstructor
 @AllArgsConstructor
-@Entity(name = "user")
+@Entity(name = "users")
 @Builder
 public class User implements UserDetails {
     @Id