ONOS-2799 Increased default log size to 10M.

Change-Id: I677d3cee21e0d2f42b91ba548fbeedb57210710f

+################################################################################
+#
+#    Licensed to the Apache Software Foundation (ASF) under one or more
+#    contributor license agreements.  See the NOTICE file distributed with
+#    this work for additional information regarding copyright ownership.
+#    The ASF licenses this file to You 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.
+#
+################################################################################
+
+# Root logger
+log4j.rootLogger=INFO, out, osgi:*
+log4j.throwableRenderer=org.apache.log4j.OsgiThrowableRenderer
+
+# CONSOLE appender not used by default
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%d{ISO8601} | %-5.5p | %-16.16t | %-32.32c{1} | %X{bundle.id} - %X{bundle.name} - %X{bundle.version} | %m%n
+
+# File appender
+log4j.appender.out=org.apache.log4j.RollingFileAppender
+log4j.appender.out.layout=org.apache.log4j.PatternLayout
+log4j.appender.out.layout.ConversionPattern=%d{ISO8601} | %-5.5p | %-16.16t | %-32.32c{1} | %X{bundle.id} - %X{bundle.name} - %X{bundle.version} | %m%n
+log4j.appender.out.file=${karaf.data}/log/karaf.log
+log4j.appender.out.append=true
+log4j.appender.out.maxFileSize=10MB
+log4j.appender.out.maxBackupIndex=10
+
+# Sift appender
+log4j.appender.sift=org.apache.log4j.sift.MDCSiftingAppender
+log4j.appender.sift.key=bundle.name
+log4j.appender.sift.default=karaf
+log4j.appender.sift.appender=org.apache.log4j.FileAppender
+log4j.appender.sift.appender.layout=org.apache.log4j.PatternLayout
+log4j.appender.sift.appender.layout.ConversionPattern=%d{ISO8601} | %-5.5p | %-16.16t | %-32.32c{1} | %m%n
+log4j.appender.sift.appender.file=${karaf.data}/log/$\\{bundle.name\\}.log
+log4j.appender.sift.appender.append=true
+