Removed joint_permissions auto_increment id

Removed auto_incrementing id and set a primary key of the [role_id,
entity_type, entity_id, action] instead since this table could recieve a
lot of activity, especially when permission regeneration was automated,
leading to very high auto_increment counts which could max out the
integer limit.

Also updated some RolesTest comment endpoints to align with
recent route changes.

Should fix #2091

database/migrations/2020_08_04_111754_drop_joint_permissions_id.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class DropJointPermissionsId extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('joint_permissions', function (Blueprint $table) {
+            $table->dropColumn('id');
+            $table->primary(['role_id', 'entity_type', 'entity_id', 'action'], 'joint_primary');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('joint_permissions', function (Blueprint $table) {
+            $table->dropPrimary(['role_id', 'entity_type', 'entity_id', 'action']);
+        });
+
+        Schema::table('joint_permissions', function (Blueprint $table) {
+            $table->increments('id')->unsigned();
+        });
+    }
+}