Avoid array index out of bounds exception

git-svn-id: https://svn.wso2.org/repos/wso2/trunk/tools@184103 a5903396-d722-0410-b921-86c7d4935375
add avro dependency to pom

git-svn-id: https://svn.wso2.org/repos/wso2/trunk/tools@184107 a5903396-d722-0410-b921-86c7d4935375