do not check file headers for src/main/webapp

server/sonar-web/pom.xml

@@ -137,6 +137,15 @@
           </archive>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>com.mycila</groupId>
+        <artifactId>license-maven-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>src/main/webapp/**/*</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
     </plugins>
   </build>