AMBARI-20849 Set the default value for sun.security.krb5.debug to false

ambari-server/src/main/resources/common-services/KNOX/0.5.0.2.2/configuration/gateway-site.xml

@@ -58,7 +58,7 @@ limitations under the License.
   </property>
   <property>
     <name>sun.security.krb5.debug</name>
-    <value>true</value>
+    <value>false</value>
     <description>Boolean flag indicating whether to enable debug messages for krb5 authentication</description>
     <on-ambari-upgrade add="true"/>
   </property>