HDFS-15208. Suppress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr in hdfs.

Contributed by Wei-Chiu Chuang.

Change-Id: I7abeaf4b65e2a4758356aa69ab8930f7e993077d
(cherry picked from commit 096533c2dc0afd51367030725d797480a22ba7e2)

 Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/test/resources/log4j.properties

(cherry picked from commit 1d55e1e229d835a6743523b9cf4c1e97b4259128)

hadoop-hdfs-project/hadoop-hdfs/src/test/resources/log4j.properties

@@ -47,3 +47,6 @@ log4j.appender.DNMETRICSRFA.layout=org.apache.log4j.PatternLayout
 log4j.appender.DNMETRICSRFA.layout.ConversionPattern=%d{ISO8601} %m%n
 log4j.appender.DNMETRICSRFA.MaxBackupIndex=1
 log4j.appender.DNMETRICSRFA.MaxFileSize=64MB
+
+# Supress KMS error log
+log4j.logger.com.sun.jersey.server.wadl.generators.WadlGeneratorJAXBGrammarGenerator=OFF