[ LDEV-1325] Added log.error() to the catch blocks in LessonManagerServlet and LeraningDesignRepositoryServlet. Now when you put incorrect parameters in, the logs will tell you so.
LDEV-1109: Fixing bugs in the authoring support for tool output based branching and getting the progress engine working. A rough implementation of the condition checking down for one MCQ condition for demonstration purposes. Two new methods added to the tool contract.