Avoid the need to run checkstyle and findbugs separately and integrate them into the build process; checkstyle runs in validate (pre-compile) phase and findbugs runs in verify (post-compile) phase

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1736460 13f79535-47bb-0310-9956-ffa450edef68

fop-core/pom.xml

       </plugin>
       <!-- code analysis - checkstyle -->
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
         <configuration>
           <configLocation>${project.baseUri}src/tools/resources/checkstyle/checkstyle.xml</configLocation>
           <suppressionsLocation>${project.baseUri}src/tools/resources/checkstyle/suppressions.xml</suppressionsLocation>
           <violationSeverity>warning</violationSeverity>
         </configuration>
+        <executions>
+          <execution>
+            <id>validate</id>
+            <phase>validate</phase>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
       </plugin>
       <!-- code analysis - findbugs -->
       <plugin>
           <effort>Max</effort>
           <threshold>Low</threshold>
         </configuration>
+        <executions>
+          <execution>
+            <id>verify</id>
+            <phase>verify</phase>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
       </plugin>
     </plugins>
     <resources>