checkstyle rule to check copyrights

Change-Id: Ia9bab40b5fe64fca539058a4316371f7acc0f387
diff --git a/tools/build/conf/src/main/resources/onos/suppressions.xml b/tools/build/conf/src/main/resources/onos/suppressions.xml
index 3c51c95..fedccd4 100644
--- a/tools/build/conf/src/main/resources/onos/suppressions.xml
+++ b/tools/build/conf/src/main/resources/onos/suppressions.xml
@@ -32,6 +32,12 @@
     <suppress files="org.onosproject.driver.pipeline.*" checks="AbbreviationAsWordInName" />
     <suppress files="org.onosproject.segmentrouting.*" checks="AbbreviationAsWordInName" />
 
+    <!-- These files carry AT&T copyrights -->
+    <suppress files="org.onlab.packet.EAP" checks="RegexpHeader" />
+    <suppress files="org.onlab.packet.EAPOL" checks="RegexpHeader" />
+    <suppress files="org.onlab.packet.RADIUS" checks="RegexpHeader" />
+    <suppress files="org.onlab.packet.RADIUSAttribute" checks="RegexpHeader" />
+
     <!-- Suppressions for unit testing code -->
     <suppress checks="Javadoc.*"
               files=".*/src/test/.*.java"