build: improve checkstyle build times by ignoring generated sources (#1139)

Signed-off-by: Simon Schrottner <[email protected]>

Author: aepfli

checkstyle.xml

@@ -30,8 +30,7 @@
     </module>
     <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
     <module name="SuppressionFilter">
-        <property name="file" value="${org.checkstyle.google.suppressionfilter.config}"
-                  default="checkstyle-suppressions.xml" />
+        <property name="file" value="checkstyle-suppressions.xml" />
         <property name="optional" value="true"/>
     </module>
 

pom.xml

@@ -226,6 +226,7 @@
                     <consoleOutput>true</consoleOutput>
                     <failsOnError>true</failsOnError>
                     <linkXRef>false</linkXRef>
+                    <excludeGeneratedSources>true</excludeGeneratedSources>
                 </configuration>
                 <dependencies>
                     <dependency>