Exclude import stmt from LineLength check

Change-Id: If45d4f8cacf72b0afe4efb34f6f5323b9e19dcdc
diff --git a/conf/checkstyle/sun_checks.xml b/conf/checkstyle/sun_checks.xml
index bbd877f..f334784 100644
--- a/conf/checkstyle/sun_checks.xml
+++ b/conf/checkstyle/sun_checks.xml
@@ -148,6 +148,7 @@
             <!-- ONOS standard usage is 80 columns, but we allow up
              to 120 to not break the build. -->
             <property name="max" value="120"/>
+            <property name="ignorePattern" value="^import"/>
         </module>
         <module name="MethodLength">
             <property name="max" value="200"/>