Fix run-in-docker by disabling useSystemClassLoader (#1418)

* test run-in-docker in travis

* fix command path

* correct batch mode arg

* disable useSystemClassLoader

.travis.yml

@@ -122,8 +122,8 @@ script:
   # fail if generators contain tab '\t'
   - /bin/bash ./bin/utils/detect_tab_in_java_class.sh
   # run integration tests defined in maven pom.xml
-  - mvn --quiet clean install
-  - mvn --quiet verify -Psamples
+  - ./run-in-docker.sh mvn --quiet --batch-mode clean install
+  - mvn --quiet --batch-mode verify -Psamples
 after_success:
   # push to maven repo
   - if [ $SONATYPE_USERNAME ] && [ -z $TRAVIS_TAG ] && [ "$TRAVIS_PULL_REQUEST" == "false" ]; then

pom.xml

@@ -156,6 +156,7 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>${surefire-version}</version>
                 <configuration>
+                    <useSystemClassLoader>false</useSystemClassLoader>
                     <testNGArtifactName>none:none</testNGArtifactName>
                     <argLine>-XX:+StartAttachListener</argLine>
                     <argLine>-javaagent:${settings.localRepository}/org/jmockit/jmockit/${jmockit-version}/jmockit-${jmockit-version}.jar</argLine>