refs #1673 move it to correct testsuite

tests/PHPUnit/phpunit.xml.dist

@@ -32,10 +32,10 @@
 <testsuites>
   <testsuite name="IntegrationTests">
       <directory>./Integration</directory>
-      <directory>../../plugins/*/tests</directory>
   </testsuite>
   <testsuite name="PluginTests">
       <directory>./Plugins</directory>
+      <directory>../../plugins/*/tests</directory>
   </testsuite>
   <testsuite name="CoreTests">
       <directory>./Core</directory>