Removed surefire plugin and configure failsafe for Travis

Author: hhandoko

pom.xml

@@ -193,19 +193,14 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
+                <artifactId>maven-failsafe-plugin</artifactId>
                 <version>2.19.1</version>
                 <!-- NOTE: Configuration as per http://stackoverflow.com/a/33757854 -->
                 <configuration>
                     <forkCount>3</forkCount>
                     <reuseForks>true</reuseForks>
                     <argLine>-Xmx1024m -XX:MaxPermSize=256m</argLine>
                 </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-failsafe-plugin</artifactId>
-                <version>2.19.1</version>
                 <executions>
                     <execution>
                         <goals>