HADOOP-13412. Move dev-support/checkstyle/suppressions.xml to hadoop-build-tools. Contributed by John Zhuge.

pom.xml

@@ -318,7 +318,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
           </dependencies>
           <configuration>
             <configLocation>checkstyle/checkstyle.xml</configLocation>
-            <suppressionsLocation>dev-support/checkstyle/suppressions.xml</suppressionsLocation>
+            <suppressionsLocation>checkstyle/suppressions.xml</suppressionsLocation>
             <includeTestSourceDirectory>true</includeTestSourceDirectory>
             <failOnViolation>false</failOnViolation>
             <format>xml</format>