Update Rome to 2.1.0 (#2462)

Author: RishiRajAnand

jbpm-distribution/pom.xml

@@ -63,7 +63,7 @@
                   <version>${version.org.igniterealtime.smack-tcp}</version>
                 </additionalDependency>
                 <additionalDependency>
-                  <groupId>rome</groupId>
+                  <groupId>com.rometools</groupId>
                   <artifactId>rome</artifactId>
                   <version>${version.rome}</version>
                 </additionalDependency>