Add aggregated Surefire report configuration

Can be executed by either running just the reporter
after a test run as been done via:
mvn surefire-report:report-only

Or report and test in one go via:
mvn surefire-report:report

A third option is:
mvn site

fixes #113

Author: aslakknutsen

pom.xml

@@ -306,6 +306,15 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-report-plugin</artifactId>
+                <version>2.17</version>
+                <configuration>
+                    <aggregate>true</aggregate>
+                    <linkXRef>true</linkXRef>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-war-plugin</artifactId>
@@ -354,8 +363,12 @@
       <plugins>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-surefire-plugin</artifactId>
+          <artifactId>maven-surefire-report-plugin</artifactId>
           <version>2.17</version>
+          <configuration>
+            <aggregate>true</aggregate>
+            <linkXRef>true</linkXRef>
+          </configuration>
         </plugin>
       </plugins>
     </reporting>