Use buck version of checkstyle rules in maven build

- build and package the checkstyle rules in the onos-build-conf artifact
- modify maven build to use new version of artifact
- fix checkstyle problems in maven-only code

Change-Id: I4e4dc890ca909e47463629c732a2fc5335bb4d2a
diff --git a/tools/build/conf/pom.xml b/tools/build/conf/pom.xml
index 66cd52e..da1ec93 100644
--- a/tools/build/conf/pom.xml
+++ b/tools/build/conf/pom.xml
@@ -27,7 +27,7 @@
 
     <groupId>org.onosproject</groupId>
     <artifactId>onos-build-conf</artifactId>
-    <version>1.4-SNAPSHOT</version>
+    <version>1.10.0-SNAPSHOT</version>
     <description>Various ONOS build settings</description>
 
     <properties>
@@ -38,7 +38,7 @@
         <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>6.11.2</version>
+            <version>6.19</version>
         </dependency>
     </dependencies>