Consolidate duplicate apache rat stanza

This resolves a build warning.

Author: gaul

project/pom.xml

@@ -684,11 +684,6 @@
           <artifactId>maven-install-plugin</artifactId>
           <version>2.4</version>
         </plugin>
-        <plugin>
-          <groupId>org.apache.rat</groupId>
-          <artifactId>apache-rat-plugin</artifactId>
-          <version>0.12</version>
-        </plugin>
         <plugin>
           <groupId>com.github.spotbugs</groupId>
           <artifactId>spotbugs-maven-plugin</artifactId>
@@ -718,6 +713,7 @@
         <plugin>
           <groupId>org.apache.rat</groupId>
           <artifactId>apache-rat-plugin</artifactId>
+          <version>0.12</version>
           <configuration>
             <excludes>
               <!-- expectation files for unit tests -->