Merge pull request #578 from Mike-Petersen/master

Added log4j properties for mongodb to not show debug output as default

mongodb/src/main/resources/log4j.properties

+# Copyright (c) 2016 YCSB contributors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you
+# may not use this file except in compliance with the License. You
+# may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied. See the License for the specific language governing
+# permissions and limitations under the License. See accompanying
+# LICENSE file.
+
+#define the console appender
+log4j.appender.consoleAppender = org.apache.log4j.ConsoleAppender
+
+# now define the layout for the appender
+log4j.appender.consoleAppender.layout = org.apache.log4j.PatternLayout
+log4j.appender.consoleAppender.layout.ConversionPattern=%-4r [%t] %-5p %c %x -%m%n
+
+# now map our console appender as a root logger, means all log messages will go
+# to this appender
+log4j.rootLogger = INFO, consoleAppender