refs #6705 fixed a couple of system tests as we do remove users only from processed report now

plugins/ExamplePlugin/tests/System/expected/test___API.get_day.xml

@@ -2,6 +2,7 @@
 <result>
 	<nb_uniq_visitors>2</nb_uniq_visitors>
 	<nb_visits>2</nb_visits>
+	<nb_users>0</nb_users>
 	<nb_actions>4</nb_actions>
 	<max_actions>2</max_actions>
 	<bounce_count>0</bounce_count>

tests/PHPUnit/System/expected/test_apiGetReportMetadata__API.getReportMetadata_day.xml

@@ -74,12 +74,14 @@
 		<metrics>
 			<nb_uniq_visitors>Unique visitors</nb_uniq_visitors>
 			<nb_visits>Visits</nb_visits>
+			<nb_users>Users</nb_users>
 			<nb_actions>Actions</nb_actions>
 			<max_actions>Maximum actions in one visit</max_actions>
 		</metrics>
 		<metricsDocumentation>
 			<nb_uniq_visitors>The number of unduplicated visitors coming to your website. Every user is only counted once, even if he visits the website multiple times a day.</nb_uniq_visitors>
 			<nb_visits>If a visitor comes to your website for the first time or if he visits a page more than 30 minutes after his last page view, this will be recorded as a new visit.</nb_visits>
+			<nb_users>The number of users logged in your website. It is the number of unique active users that have a User ID set (via the Tracking code function 'setUserId').</nb_users>
 			<nb_actions>The number of actions performed by your visitors. Actions can be page views, internal site searches, downloads or outlinks.</nb_actions>
 			<bounce_rate>The percentage of visits that only had a single pageview. This means, that the visitor left the website directly from the entrance page.</bounce_rate>
 			<nb_actions_per_visit>The average number of actions (page views, site searches, downloads or outlinks) that were performed during the visits.</nb_actions_per_visit>

tests/PHPUnit/System/expected/test_apiGetReportMetadata__API.get_day.xml

@@ -2,6 +2,7 @@
 <result>
 	<nb_uniq_visitors>1</nb_uniq_visitors>
 	<nb_visits>1</nb_visits>
+	<nb_users>0</nb_users>
 	<nb_actions>1</nb_actions>
 	<max_actions>1</max_actions>
 	<bounce_count>1</bounce_count>