Re-enable checkstyle in web module

Author: ahornace

.mvn/wrapper/maven-wrapper.properties

@@ -1 +1 @@
-distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.6.0/apache-maven-3.6.0-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.1/apache-maven-3.6.1-bin.zip

opengrok-web/pom.xml

@@ -200,6 +200,10 @@ Portions Copyright (c) 2018, Chris Fraire <[email protected]>.
                     </argLine>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
         </plugins>
     </build>
 

pom.xml

@@ -296,14 +296,7 @@ Portions Copyright (c) 2018, Chris Fraire <[email protected]>.
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-checkstyle-plugin</artifactId>
-                    <version>3.0.0</version>
-                    <dependencies>
-                        <dependency>
-                            <groupId>com.puppycrawl.tools</groupId>
-                            <artifactId>checkstyle</artifactId>
-                            <version>8.17</version>
-                        </dependency>
-                    </dependencies>
+                    <version>3.1.0</version>
                     <executions>
                         <execution>
                             <id>checkstyle</id>
@@ -315,7 +308,6 @@ Portions Copyright (c) 2018, Chris Fraire <[email protected]>.
                                 <failsOnError>true</failsOnError>
                                 <suppressionsLocation>/dev/checkstyle/suppressions.xml</suppressionsLocation>
                                 <headerLocation>/dev/checkstyle/fileheader.txt</headerLocation>
-                                <sourceDirectories>${project.build.sourceDirectory}</sourceDirectories>
                             </configuration>
                             <goals>
                                 <goal>check</goal>