Cleanup configuration of sonar-maven-plugin

This change updates the plugin from 5.0.0.4389 to 5.1.0.4751 and also
moves part of its configuration from the Jenkinsfile to the parent pom.

In order to avoid the "'sonar.java.binaries' is empty" warning, this
property is now initialized with the project-relative "target/classes"
path.

Author: ptziegler

Jenkinsfile

@@ -143,14 +143,10 @@ def void mvn() {
            --no-transfer-progress \
            -DapiBaselineTargetDirectory=${WORKSPACE} \
            -Dmaven.repo.local=$WORKSPACE/.m2/repository \
-           -Dproject.build.sourceEncoding=UTF-8 \
            -Dbuild.id=${BUILD_TIMESTAMP} \
            -Dcommit.id=$GIT_COMMIT \
            -Dbuild.type=$BUILD_TYPE \
            -Dorg.eclipse.justj.p2.manager.build.url=$JOB_URL \
-           -Dsonar.exclusions=**/.tycho-consumer-pom.xml \
-           -Dsonar.projectKey=gef-classic \
-           -Dsonar.organization=eclipse \
            clean \
            verify \
            sonar:sonar

pom.xml

@@ -22,6 +22,11 @@
 		<jruby.version>9.4.5.0</jruby.version>
 		<target-platform>../target-platform/GEF_classic.target</target-platform>
 		<execution-environment>JavaSE-21</execution-environment>
+		<!-- SonarQube configuration -->
+		<sonar.exclusion>**/.tycho-consumer-pom.xml</sonar.exclusion>
+		<sonar.projectKey>gef-classic</sonar.projectKey>
+		<sonar.java.binaries>${project.build.outputDirectory}</sonar.java.binaries>
+		<sonar.organization>eclipse</sonar.organization>
 	</properties>
 
 	<build>
@@ -315,7 +320,7 @@
 				<plugin>
 					<groupId>org.sonarsource.scanner.maven</groupId>
 					<artifactId>sonar-maven-plugin</artifactId>
-					<version>5.0.0.4389</version>
+					<version>5.1.0.4751</version>
 				</plugin>
 			</plugins>
 		</pluginManagement>