Update lic header in appc client and config xml

Modify license header in appc-adapter xml, appc-client xml and appc-config xml files to reflect 2018 changes.

Change-Id: I1b7bd41a43ca5662ed4d293a33f468e443551fd7
Issue-ID: APPC-1000
Signed-off-by: John McClung <jm1364@att.com>
diff --git a/appc-config/appc-config-adaptor/provider/pom.xml b/appc-config/appc-config-adaptor/provider/pom.xml
index 919e23b..ea4f619 100644
--- a/appc-config/appc-config-adaptor/provider/pom.xml
+++ b/appc-config/appc-config-adaptor/provider/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
   =============================================================================