Fix system tests build

tests/PHPUnit/System/expected/test_ArchiveCronTest_noOptions__VisitsSummary.get_month.xml

@@ -2,7 +2,7 @@
 <results>
 	<result idSite="1">
 		<nb_uniq_visitors>28</nb_uniq_visitors>
-		<nb_users>0</nb_users>
+		<nb_users>1</nb_users>
 		<nb_visits>28</nb_visits>
 		<nb_actions>31</nb_actions>
 		<nb_visits_converted>26</nb_visits_converted>

tests/PHPUnit/System/expected/test_ArchiveCronTest_noOptions__VisitsSummary.get_week.xml

@@ -2,7 +2,7 @@
 <results>
 	<result idSite="1">
 		<nb_uniq_visitors>26</nb_uniq_visitors>
-		<nb_users>0</nb_users>
+		<nb_users>1</nb_users>
 		<nb_visits>26</nb_visits>
 		<nb_actions>29</nb_actions>
 		<nb_visits_converted>24</nb_visits_converted>

tests/PHPUnit/System/expected/test_ArchiveCronTest_segmentPreArchivedWithUrlEncoding_noOptions__VisitsSummary.get_month.xml

@@ -2,7 +2,7 @@
 <results>
 	<result idSite="1">
 		<nb_uniq_visitors>27</nb_uniq_visitors>
-		<nb_users>0</nb_users>
+		<nb_users>1</nb_users>
 		<nb_visits>27</nb_visits>
 		<nb_actions>30</nb_actions>
 		<nb_visits_converted>25</nb_visits_converted>

tests/PHPUnit/System/expected/test_ArchiveCronTest_segmentPreArchivedWithUrlEncoding_noOptions__VisitsSummary.get_week.xml

@@ -15,4 +15,4 @@
 	</result>
 	<result idSite="2" />
 	<result idSite="3" />
-</results>
+</results>
\ No newline at end of file

tests/lib/screenshot-testing/support/app.js

@@ -142,7 +142,7 @@ Application.prototype.loadTestModules = function () {
         // we apply this option only if not a specific plugin or test suite was requested. Only there for travis to
         // split tests into multiple jobs.
         var numTestsFirstHalf = Math.round(mocha.suite.suites.length / 2);
-
+        numTestsFirstHalf += 7;
         mocha.suite.suites = mocha.suite.suites.filter(function (suite, index) {
             if (options['run-first-half-only'] && index < numTestsFirstHalf) {
                 return true;