Revert "HADOOP-13119. Add ability to secure log servlet using proxy users.  Contribute by Yuanbo Liu."

This reverts commit a847903b6e64c6edb11d852b91f2c816b1253eb3.

Change-Id: I3122a2142f5bdf8507dece930e447556a43cd9ae
(cherry picked from commit 8fad3ec76070ccfcd3ed80feaba4355077bc6f5c)
(cherry picked from commit fa6a8b78d481d3b4d355e1bf078f30dd5e09850d)

 Conflicts:
	hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/http/TestHttpServerWithSpengo.java
	hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestAuthenticationWithProxyUserFilter.java

(cherry picked from commit ca65409836d2949e9a9408d40bec0177b414cd5d)
5 files changed