MDL-57791 analytics: Changes after review

- Split model::predict in parts
- JS promises updated according to eslint-plugin-promise
- New API methods replacing direct DB queries
- Reduce insights nav link display cost
- Increase time limit as well as memory for big processes
- Move prediction action event to core
- Dataset write locking and others
- Refine last time range end time
- Removed dodgy splitting method id to int
- Replace admin_setting_predictor output_html overwrite for write_setting overwrite
- New APIs for access control
- Discard invalid samples also during prediction

analytics/tests/model_test.php

@@ -40,6 +40,8 @@ class analytics_model_testcase extends advanced_testcase {
 
     public function setUp() {
 
+        $this->setAdminUser();
+
         $target = \core_analytics\manager::get_target('test_target_shortname');
         $indicators = array('test_indicator_max', 'test_indicator_min', 'test_indicator_fullname');
         foreach ($indicators as $key => $indicator) {