Merge pull request #10 from ypwalter/1.4

1.4
Added buri_v140.json
Merge branch '1.4+' of https://github.com/Mozilla-TWQA/MTBF-Driver into 1.4+
modified for buri_v140.json
modified typo
modified buri v1.4 json again.
Modified to import GaiaDevice in MtbfTestCases
Changed unlock lockscreen
Add config validation
Merge branch '1.4+' of https://github.com/Mozilla-TWQA/MTBF-Driver into 1.4+
fix pep8 warning
move memory report args to individual file; fix to invoke load config in mtbf
move memory report args to individual file; fix to invoke load config in mtbf
Merge branch '1.4+' of https://github.com/Mozilla-TWQA/MTBF-Driver into 1.4+
fix wrong validation
Update MtbfTestCase.py