Merge pull request #1981 from bridadan/travis-config-tests

Adding config tests to travis script

Author: sg-

.travis.yml

@@ -1,7 +1,9 @@
 python:
   - "2.7"
 
-script: "python tools/build_travis.py"
+script:
+  - PYTHONPATH=. python tools/test/config_test/config_test.py
+  - python tools/build_travis.py
 before_install:
   - sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
   - sudo apt-get update -qq