HADOOP-10710. hadoop.auth cookie is not properly constructed according to RFC2109. (Juan Yu via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606923 13f79535-47bb-0310-9956-ffa450edef68

Conflicts:
	hadoop-common-project/hadoop-common/CHANGES.txt
Merge pull request #55 from VertiPub/branch-2.4.1-alti-HD-395

HADOOP-10710. hadoop.auth cookie is not properly constructed according t...
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