HADOOP-9299.  kerberos name resolution is kicking in even when kerberos is not configured (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1457763 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge branch 'trunk-gd' of https://github.com/griddynamics/yhadoop-common into fb-HADOOP-9166-trunk-gd

Conflicts:
	hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java