[feature] update travis config

Author: liuwill

.travis.yml

@@ -4,4 +4,4 @@ jdk:
   - oraclejdk8
 
 install:
-   - gradle clean build
+   - gradle clean build --info

build.gradle

@@ -163,8 +163,8 @@ checkstyle{
 
 tasks.withType(Checkstyle) {
     reports {
-        xml.enabled = false
-        html.enabled = true
+        // xml.enabled = false
+        // html.enabled = true
         // html.stylesheet resources.text.fromFile('config/xsl/checkstyle-custom.xsl')
     }
     configFile = file('config/checkstyle/checkstyle.xml')