SLING-1404 - use build-helper-maven-plugin to select ports in all modules that do integration testing

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@915282 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 52ecbaf..021d92b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -101,7 +101,6 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>
-                <version>1.5</version>
                 <executions>
                     <execution>
                         <id>reserve-network-port</id>