MDL-36017 Fields numsections, hiddensections and coursedisplay are now format-specific options

- Fields added to format_legacy as default course format options;
- Upgrade script copies fields values from table course to course_format_options;
- Fields removed from table course;
- Fields removed from edit course form;
- Since front-page course has a 'numsections' setting, format_site defines it as it's option;
- Removed accessing those fields in core code unless we know that format supports them and in this
  case instead of $course = $DB->get_record('course'); we use:
  $course = course_get_format($courseorid)->get_course(); This way all format-specific options
  are added to the $course object

enrol/database/lib.php

@@ -753,6 +753,7 @@ class enrol_database_plugin extends enrol_plugin {
             $template = false;
             if ($templatecourse) {
                 if ($template = $DB->get_record('course', array('shortname'=>$templatecourse))) {
+                    $template = fullclone(course_get_format($template)->get_course());
                     unset($template->id);
                     unset($template->fullname);
                     unset($template->shortname);
@@ -769,8 +770,6 @@ class enrol_database_plugin extends enrol_plugin {
                 $template->summary        = '';
                 $template->summaryformat  = FORMAT_HTML;
                 $template->format         = $courseconfig->format;
-                $template->numsections    = $courseconfig->numsections;
-                $template->hiddensections = $courseconfig->hiddensections;
                 $template->newsitems      = $courseconfig->newsitems;
                 $template->showgrades     = $courseconfig->showgrades;
                 $template->showreports    = $courseconfig->showreports;