LDEV-4678 WebUtil.putActivityPositionInRequestByToolSessionId transformed into service methodAlso introduce ICommonToolService that will hold methods shared by alltools.
LDEV-4678 Remove all ServiceProxy classesAlso get rid of LearningWebUtil.putActivityPositionInRequest(LongactivityId, HttpServletRequest request, ServletContext context) andLearningWebUtil.getActivityMapping(ServletContext context) methods. Asit's better to invoke according service methods directly.