Small fix for Student Courses
 Changes to be committed:
	renamed:    school-dao/src/main/java/school/dto/CourseTeacherDTO.java -> school-dao/src/main/java/school/dto/CourseDTO.java
	modified:   school-service/src/main/java/school/service/CourseService.java
	modified:   school-service/src/main/java/school/service/implementation/CourseServiceImpl.java
	modified:   school-web/src/main/java/school/controller/CourseController.java
	modified:   school-web/src/main/webapp/views/courses/student.jsp