Update krb5.conf
Added the mandatory AL 2.0 license header
diff --git a/docker/maven-build/files/krb5.conf b/docker/maven-build/files/krb5.conf
index 096316a..cebcf6f 100644
--- a/docker/maven-build/files/krb5.conf
+++ b/docker/maven-build/files/krb5.conf
@@ -1,3 +1,21 @@
+#
+# 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.
+#
[libdefaults]
default_realm = EXAMPLE.COM
