fix(sdk): configure source directories for maven-checkstyle-plugin

Signed-off-by: Scott Hamrick <2623452+cshamrick@users.noreply.github.com>

Author: cshamrick

pom.xml

@@ -283,6 +283,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
+                <configuration>
+                    <sourceDirectories>${project.build.sourceDirectory}</sourceDirectories>
+                </configuration>
                 <executions>
                     <execution>
                         <id>validate</id>