Coverity static-analysis scan found resource leak in OidsUtil static initialization block.

https://scan7.coverity.com/reports.htm#v16159/p11778/fileInstanceId=6804056&defectInstanceId=1776762&mergedDefectId=1384493
Following code is used in the static block

props.load(OidsUtil.class.getResourceAsStream("oids.properties"));

The resource created by OidsUtil.class.getResourceAsStream("oids.properties") is not closed properly.