change cron task to run smoke as regression test need too long time.

.travis.yml

@@ -49,7 +49,7 @@ matrix:
           pip3 install --user ${TRAVIS_BUILD_DIR}/src/connector/python/linux/python3/
 
           cd ${TRAVIS_BUILD_DIR}/tests
-          ./test-all.sh $TRAVIS_EVENT_TYPE || travis_terminate $?
+          ./test-all.sh smoke || travis_terminate $?
 
           cd ${TRAVIS_BUILD_DIR}/tests/pytest
           ./valgrind-test.sh 2>&1 > mem-error-out.log
@@ -169,7 +169,7 @@ matrix:
 
           cd ${TRAVIS_BUILD_DIR}/tests
 
-          ./test-all.sh $TRAVIS_EVENT_TYPE COVER
+          ./test-all.sh smoke COVER
 
           TEST_RESULT=$?