Add license headers to new files

Author: sryza

yarn/alpha/src/main/resources/log4j-spark-container.properties

@@ -1,3 +1,16 @@
+#
+# 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.
+
 # Set everything to be logged to the console
 log4j.rootCategory=INFO, console
 log4j.appender.console=org.apache.log4j.ConsoleAppender

yarn/stable/src/main/resources/log4j-spark-container.properties

@@ -1,3 +1,16 @@
+#
+# 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.
+
 # Set everything to be logged to the console
 log4j.rootCategory=INFO, console
 log4j.appender.console=org.apache.log4j.ConsoleAppender