Match also junit-platform-commons-* file name when detecting a JUnit 6 launch type

Fixes: #2625

Author: trancexpress

org.eclipse.jdt.junit.core/src/org/eclipse/jdt/internal/junit/util/CoreTestSearchEngine.java

@@ -60,8 +60,8 @@
  */
 public class CoreTestSearchEngine {
 
-	private static final String JUNIT_PLATFORM_SUITE_API_PREFIX= BuildPathSupport.JUNIT_PLATFORM_SUITE_API + "_"; //$NON-NLS-1$
-	private static final String JUNIT_PLATFORM_COMMONS_PREFIX= BuildPathSupport.JUNIT_PLATFORM_COMMONS + "_"; //$NON-NLS-1$
+	private static final String JUNIT_PLATFORM_SUITE_API_PREFIX= BuildPathSupport.JUNIT_PLATFORM_SUITE_API;
+	private static final String JUNIT_PLATFORM_COMMONS_PREFIX= BuildPathSupport.JUNIT_PLATFORM_COMMONS;
 	private static final String JAR_EXTENSION= ".jar"; //$NON-NLS-1$
 
 	public static boolean isTestOrTestSuite(IType declaringType) throws CoreException {