I wonder also why the explicitly setting of the JAXB version does not seem to work for you. The plugin is configured via:

            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>jaxb2-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>xjc</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <packageName>org.hibernate.validator.internal.xml</packageName>
                    <extension>true</extension>
                    <schemaFiles>validation-configuration-1.1.xsd,validation-mapping-1.1.xsd</schemaFiles>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>javax.xml.bind</groupId>
                        <artifactId>jaxb-api</artifactId>
                        <version>2.2.5</version>
                    </dependency>
                    <dependency>
                        <groupId>com.sun.xml.bind</groupId>
                        <artifactId>jaxb-impl</artifactId>
                        <version>2.1.13</version>
                    </dependency>
                </dependencies>
            </plugin>

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