cleanup logs for Travis + new process for each test

pom.xml

@@ -113,6 +113,10 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <version>${org.apache.maven.plugins.maven-surefire-plugin.version}</version>
+        <configuration>
+          <forkCount>1</forkCount>
+          <reuseForks>false</reuseForks>
+        </configuration>
       </plugin>
       
       <plugin>