Update license header on appc-adapter xml files

Modify license header on appc-adapter xml and .code_styling xml files to reflect 2018 changes.  I also had to fix the xml_version line syntax for the .code_styling xml files.

Change-Id: I361f64d3d6edbf43b6c7ae06611f64ee183b7d82
Issue-ID: APPC-999
Signed-off-by: John McClung <jm1364@att.com>
diff --git a/appc-adapters/appc-netconf-adapter/appc-netconf-adapter-features/pom.xml b/appc-adapters/appc-netconf-adapter/appc-netconf-adapter-features/pom.xml
index 6e1f962..78125c2 100644
--- a/appc-adapters/appc-netconf-adapter/appc-netconf-adapter-features/pom.xml
+++ b/appc-adapters/appc-netconf-adapter/appc-netconf-adapter-features/pom.xml
@@ -3,7 +3,7 @@
   ============LICENSE_START=======================================================
   ONAP : APPC
   ================================================================================
-  Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+  Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
   Copyright (C) 2017 Amdocs
   ================================================================================
   Licensed under the Apache License, Version 2.0 (the "License");
@@ -18,7 +18,6 @@
   See the License for the specific language governing permissions and
   limitations under the License.
   ============LICENSE_END=========================================================
-  ECOMP is a trademark and service mark of AT&T Intellectual Property.
   -->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>