<build>
<plugins>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-checkstyle-plugin</artifactId>
+ <configuration>
+ <propertyExpansion>checkstyle.violationSeverity=warning</propertyExpansion>
+ </configuration>
+ </plugin>
<plugin>
<groupId>org.opendaylight.yangtools</groupId>
<artifactId>yang-maven-plugin</artifactId>