Changed the surefire fork model for Spark

Author: sapessi

aws-serverless-java-container-spark/pom.xml

@@ -41,4 +41,18 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <!-- fork JVM before each spring test to make sure we have a clean context -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.9</version>
+                <configuration>
+                    <forkMode>always</forkMode>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>