Revert "don't run function test in PR" (aliyun#154)

This reverts commit 8c9ba70.

Author: Qingtang-SDK

.travis.yml

@@ -18,9 +18,7 @@ install:
   - pip install mock
 
 script:
-  - make lint
-  - make test
-  - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then make functional-test; fi
+  - make test-all
 
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