MDL-67673 phpunit: Fix the return type of template methods

All the setup/teardown/pre/post/conditions template methods
now are required to return void. This was warned with phpunit 7
and now is enforced.

At the same time, fix a few wrong function names,
provider data and param types, return statements...

report/completion/tests/events_test.php

@@ -38,7 +38,7 @@ class report_completion_events_testcase extends advanced_testcase {
     /**
      * Setup testcase.
      */
-    public function setUp() {
+    public function setUp(): void {
         $this->setAdminUser();
         $this->resetAfterTest();
     }

report/log/tests/events_test.php

@@ -38,7 +38,7 @@ class report_log_events_testcase extends advanced_testcase {
     /**
      * Setup testcase.
      */
-    public function setUp() {
+    public function setUp(): void {
         $this->setAdminUser();
         $this->resetAfterTest();
     }

report/log/tests/lib_test.php

@@ -50,7 +50,7 @@ class report_log_lib_testcase extends advanced_testcase {
      */
     private $tree;
 
-    public function setUp() {
+    public function setUp(): void {
         $this->user = $this->getDataGenerator()->create_user();
         $this->course = $this->getDataGenerator()->create_course();
         $this->tree = new \core_user\output\myprofile\tree();

report/loglive/tests/events_test.php

@@ -38,7 +38,7 @@ class report_loglive_events_testcase extends advanced_testcase {
     /**
      * Setup testcase.
      */
-    public function setUp() {
+    public function setUp(): void {
         $this->setAdminUser();
         $this->resetAfterTest();
     }

report/outline/tests/lib_test.php

@@ -60,7 +60,7 @@ class report_outline_lib_testcase extends advanced_testcase {
      */
     private $roleid;
 
-    public function setUp() {
+    public function setUp(): void {
         $this->user = $this->getDataGenerator()->create_user();
         $this->user2 = $this->getDataGenerator()->create_user();
         $this->course = $this->getDataGenerator()->create_course();

report/questioninstances/tests/events_test.php

@@ -36,7 +36,7 @@ class report_questioninstances_events_testcase extends advanced_testcase {
     /**
      * Setup testcase.
      */
-    public function setUp() {
+    public function setUp(): void {
         $this->setAdminUser();
         $this->resetAfterTest();
     }

report/stats/tests/events_test.php

@@ -38,7 +38,7 @@ class report_stats_events_testcase extends advanced_testcase {
     /**
      * Setup testcase.
      */
-    public function setUp() {
+    public function setUp(): void {
         $this->setAdminUser();
         $this->resetAfterTest();
     }

report/stats/tests/lib_test.php

@@ -48,7 +48,7 @@ class report_stats_lib_testcase extends advanced_testcase {
      */
     private $tree;
 
-    public function setUp() {
+    public function setUp(): void {
         $this->user = $this->getDataGenerator()->create_user();
         $this->course = $this->getDataGenerator()->create_course();
         $this->tree = new \core_user\output\myprofile\tree();

report/usersessions/tests/lib_test.php

@@ -52,7 +52,7 @@ class report_usersessions_lib_testcase extends advanced_testcase {
      */
     private $tree;
 
-    public function setUp() {
+    public function setUp(): void {
         $this->user = $this->getDataGenerator()->create_user();
         $this->course = $this->getDataGenerator()->create_course();
         $this->tree = new \core_user\output\myprofile\tree();