HADOOP-15970. Upgrade plexus-utils from 2.0.5 to 3.1.0.

hadoop-project/pom.xml

@@ -716,7 +716,7 @@
       <dependency>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-utils</artifactId>
-        <version>2.0.5</version>
+        <version>3.1.0</version>
       </dependency>
       <dependency>
         <groupId>org.codehaus.plexus</groupId>