Applied patch from jira issue - OFBIZ-5150 - reserveProductInventory method looses priority attribute in oisgir for non serialized and non requireInventory.
Thanks Deepak Agarwal for reporting the issue and Thanks Arun for providing the patch. 

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1639840 13f79535-47bb-0310-9956-ffa450edef68