change spring validation
changes
Merge branch 'master' of https://github.com/nromanen/Ch-025 into hash

Conflicts:
	SSEL/src/main/java/com/softserve/controller/TeacherController.java
UpDown
commit for sdc
Merge branch 'master' of https://github.com/nromanen/Ch-025 into hash

Conflicts:
	SSEL/.classpath
	SSEL/src/main/webapp/WEB-INF/views/teacher/editTopic.jsp