fix(travis): update rocketmq download link to apache archive.

fix(travis): update rocketmq download link to apache archive.
diff --git a/.travis.yml b/.travis.yml
index aec2c9a..7488db8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@
   - if [ "$TRAVIS_OS_NAME" == "linux" ]; then jdk_switcher use "$CUSTOM_JDK"; fi
 
 before_script:
-  - wget http://us.mirrors.quenda.co/apache/rocketmq/4.3.2/rocketmq-all-4.3.2-bin-release.zip
+  - wget https://archive.apache.org/dist/rocketmq/4.3.2/rocketmq-all-4.3.2-bin-release.zip
   - unzip rocketmq-all-4.3.2-bin-release.zip
   - cd rocketmq-all-4.3.2-bin-release
   - perl -i -pe's/-Xms8g -Xmx8g -Xmn4g/-Xms2g -Xmx2g -Xmn1g/g' bin/runbroker.sh