Applied bug fix from jira issue - OFBIZ-254 - Noisy, Possibly Unnecessary Logging when a browser request is cancelled by the user.
Thanks Jacopo for reporting the issue and thanks Pranay for the contribution. 


git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1626458 13f79535-47bb-0310-9956-ffa450edef68