use plexus-utils in this library, ensure we get the managed version

git-svn-id: https://svn.apache.org/repos/asf/maven/repository-manager/trunk@379674 13f79535-47bb-0310-9956-ffa450edef68

maven-repository-converter/pom.xml

@@ -25,6 +25,10 @@
   <artifactId>maven-repository-converter</artifactId>
   <name>Maven Repository Converter</name>
   <dependencies>
+    <dependency>
+      <groupId>org.codehaus.plexus</groupId>
+      <artifactId>plexus-utils</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-artifact</artifactId>