mvn use batch mode

Author: guozhenhong

.travis.yml

@@ -2,8 +2,8 @@ language: java
 dist: trusty
 jdk:
   - oraclejdk8
-install: mvn install -DskipTests=true -Dgpg.skip=true -Djavadoc.skip=true
-script: mvn package -DskipTests=true -Dgpg.skip=true -Djavadoc.skip=true
+install: mvn install -B -DskipTests=true -Dgpg.skip=true -Djavadoc.skip=true
+script: mvn package -B -DskipTests=true -Dgpg.skip=true -Djavadoc.skip=true
 deploy:
   provider: releases
   api_key:
@@ -20,7 +20,7 @@ env:
 after_deploy:
 - echo "deploying to maven central"
 - gpg --import secret.key.asc
-- mvn deploy --settings settings.xml -DskipTests=true -Dgpg.passphrase=$GPG_PASSPHRASE
+- mvn deploy --settings settings.xml  -B -DskipTests=true -Dgpg.passphrase=$GPG_PASSPHRASE
 before_install:
 - openssl aes-256-cbc -K $encrypted_f86dc6d297df_key -iv $encrypted_f86dc6d297df_iv
   -in secret.key.asc.enc -out secret.key.asc -d