MAGETWO-69137: upgrading Magento2 Project PHPUnit version to latest

 - changed unit tests to support PHPUnit 6.2

Author: Robert He

.travis.yml

@@ -60,6 +60,6 @@ script:
 
   # The scripts for grunt/phpunit type tests
   - if [ $TEST_SUITE == "functional" ]; then
-        dev/tests/functional/vendor/phpunit/phpunit/phpunit --debug --verbose -c dev/tests/$TEST_SUITE $TEST_FILTER; fi
-  - if [ $TEST_SUITE != "functional" && $TEST_SUITE != "js" ]; then phpunit --debug --verbose -c dev/tests/$TEST_SUITE $TEST_FILTER; fi
+        dev/tests/functional/vendor/phpunit/phpunit/phpunit -c dev/tests/$TEST_SUITE $TEST_FILTER; fi
+  - if [ $TEST_SUITE != "functional" && $TEST_SUITE != "js" ]; then phpunit -c dev/tests/$TEST_SUITE $TEST_FILTER; fi
   - if [ $TEST_SUITE == "js" ]; then grunt $GRUNT_COMMAND; fi