Add commons.bc.version property for the release plugin.
diff --git a/pom.xml b/pom.xml
index bd100bb..5d164fd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -41,6 +41,7 @@
     <!-- To use the commons-release plugin -->
     <commons.componentid>skin</commons.componentid>
     <commons.release.isDistModule>true</commons.release.isDistModule>
+    <commons.bc.version>4.1</commons.bc.version>
     <!-- No svn staging -->
     <commons.distSvnStagingUrl></commons.distSvnStagingUrl>
     <commons.releaseManagerName>Alex Herbert</commons.releaseManagerName>