Issue #269: update pom.xml to include test sources for checkstyle

Author: Daniel Muehlbachler

pom.xml

@@ -408,6 +408,7 @@
               <headerLocation>I just need to put here smth to let it not use default - LICENSE.txt</headerLocation>
               <propertiesLocation>config/checkstyle.properties</propertiesLocation>
               <includeTestResources>false</includeTestResources>
+              <includeTestSourceDirectory>true</includeTestSourceDirectory>
             </configuration>
           </execution>
           <execution>

src/test/java/org/sonar/plugins/checkstyle/internal/ChecksTest.java

@@ -397,8 +397,10 @@ else if (AbstractFileSetCheck.class.isAssignableFrom(clss)) {
         // remove undocumented properties
         new HashSet<>(properties)
                 .stream()
-                .filter(property -> UNDOCUMENTED_PROPERTIES
-                        .contains(clss.getSimpleName() + "." + property))
+                .filter(property -> {
+                    return UNDOCUMENTED_PROPERTIES
+                            .contains(clss.getSimpleName() + "." + property);
+                })
                 .forEach(properties::remove);
 
         if (AbstractCheck.class.isAssignableFrom(clss)) {