HADOOP-7450. wagon plugin version has been removed accidentally

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.22@1202497 13f79535-47bb-0310-9956-ffa450edef68

common/ivy/libraries.properties

@@ -61,6 +61,8 @@ rats-lib.version=0.6
 slf4j-api.version=1.6.1
 slf4j-log4j12.version=1.6.1
 
+wagon-http.version=1.0-beta-2
+
 xmlenc.version=0.52
 xerces.version=1.4.4