Validate all maven plugin dependencies (and whether there are newer ones) in project pom against mvn 3.2.1

   <maven.plugin.antrun.version>1.7</maven.plugin.antrun.version>
    <maven.plugin.assembly.version>2.4</maven.plugin.assembly.version>
    <maven.plugin.buildnumber.version>1.2</maven.plugin.buildnumber.version>
    <maven.plugin.cargo.version>1.4.13</maven.plugin.cargo.version>
    <maven.plugin.changes.version>2.9</maven.plugin.changes.version>
    <maven.plugin.changelog.version>2.2</maven.plugin.changelog.version>
    <maven.plugin.clean.version>2.5</maven.plugin.clean.version>
    <maven.plugin.compiler.version>3.1</maven.plugin.compiler.version>
    <maven.plugin.dependency.version>2.9</maven.plugin.dependency.version>
    <maven.plugin.deploy.version>2.8.1</maven.plugin.deploy.version>
    <maven.plugin.eclipse.version>2.9</maven.plugin.eclipse.version>
    <maven.plugin.exec.version>1.3.2</maven.plugin.exec.version>
    <maven.plugin.failsafe.version>2.17</maven.plugin.failsafe.version>
    <maven.plugin.install.version>2.5.1</maven.plugin.install.version>
    <maven.plugin.jar.version>2.4</maven.plugin.jar.version>
    <maven.plugin.javadoc.version>2.9.1</maven.plugin.javadoc.version>
    <maven.plugin.jrebel.version>1.1.5</maven.plugin.jrebel.version>
    <maven.plugin.project-info.version>2.7</maven.plugin.project-info.version>
    <maven.plugin.release.version>2.5.2</maven.plugin.release.version>
    <maven.plugin.rat.version>0.9</maven.plugin.rat.version>
    <maven.plugin.remote-resources.version>1.5</maven.plugin.remote-resources.version>
    <maven.plugin.resources.version>2.6</maven.plugin.resources.version>
    <maven.plugin.source.version>2.2.1</maven.plugin.source.version>
    <maven.plugin.surefire.version>2.16</maven.plugin.surefire.version>
    <maven.plugin.surefire-report.version>2.16</maven.plugin.surefire-report.version>
    <maven.plugin.taglib.version>2.4</maven.plugin.taglib.version>
    <maven.plugin.war.version>2.4</maven.plugin.war.version>
    <maven.plugin.enforcer.version>1.4</maven.plugin.enforcer.version>
    <maven.build.helper.version>1.9.1</maven.build.helper.version>

<plugin>
            <groupId>org.apache.rat</groupId>
            <artifactId>apache-rat-plugin</artifactId>
            <version>${maven.plugin.rat.version}</version>
            <dependencies><!-- see https://issues.apache.org/jira/browse/RAT-158 -->
              <dependency>
                <groupId>org.apache.maven.doxia</groupId>
                <artifactId>doxia-core</artifactId>
                <version>1.6</version>
                <exclusions>
                  <exclusion>
                    <groupId>xerces</groupId>
                    <artifactId>xercesImpl</artifactId>
                  </exclusion>
                </exclusions>
              </dependency>
            </dependencies>