Aded roles API controller methods

Altered & updated permissions repo, and existing connected
RoleController to suit.
Also extracts in-app success notifications to auto activity system.
Tweaked tests where required.

lang/en/activities.php

@@ -67,6 +67,11 @@ return [
     'user_update_notification' => 'User successfully updated',
     'user_delete_notification' => 'User successfully removed',
 
+    // Roles
+    'role_create_notification' => 'Role successfully created',
+    'role_update_notification' => 'Role successfully updated',
+    'role_delete_notification' => 'Role successfully deleted',
+
     // Other
     'commented_on'                => 'commented on',
     'permissions_update'          => 'updated permissions',

lang/en/settings.php

@@ -143,13 +143,11 @@ return [
     'roles_assigned_users' => 'Assigned Users',
     'roles_permissions_provided' => 'Provided Permissions',
     'role_create' => 'Create New Role',
-    'role_create_success' => 'Role successfully created',
     'role_delete' => 'Delete Role',
     'role_delete_confirm' => 'This will delete the role with the name \':roleName\'.',
     'role_delete_users_assigned' => 'This role has :userCount users assigned to it. If you would like to migrate the users from this role select a new role below.',
     'role_delete_no_migration' => "Don't migrate users",
     'role_delete_sure' => 'Are you sure you want to delete this role?',
-    'role_delete_success' => 'Role successfully deleted',
     'role_edit' => 'Edit Role',
     'role_details' => 'Role Details',
     'role_name' => 'Role Name',
@@ -175,7 +173,6 @@ return [
     'role_own' => 'Own',
     'role_controlled_by_asset' => 'Controlled by the asset they are uploaded to',
     'role_save' => 'Save Role',
-    'role_update_success' => 'Role successfully updated',
     'role_users' => 'Users in this role',
     'role_users_none' => 'No users are currently assigned to this role',