Improve MAVEN build Performance (#3851)

Co-authored-by: Chen Zhang <340355960@qq.com>

.travis.yml

@@ -14,7 +14,7 @@ cache:
 install: true
 
 script:
-  - travis_wait 30 ./mvnw clean install -DskipTests=false -Dcheckstyle.skip=true -Dmaven.javadoc.skip=true
+  - travis_wait 30 ./mvnw -T 1C clean install -DskipTests=false -Dcheckstyle.skip=true -Dmaven.javadoc.skip=true
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)

pom.xml

@@ -419,6 +419,9 @@
                     <systemProperties>
                         <!-- common shared -->
                     </systemProperties>
+                	<parallel>classes</parallel>
+                	<useUnlimitedThreads>true</useUnlimitedThreads>
+
                 </configuration>
             </plugin>
             <!-- javadoc -->