Parse the test cases results log by json

[wanghongjuan]

• Generate a json file to collect the test results.
• Locate easily the failed tests in result file when using the results file
• Quickly generate results to match the specified format that QA required
• JSON dose not need to take up extra workspace.

Signed-off-by: Wang Hongjuan hongjuan.wang@intel.com

[gabrielschulhof]

@wanghongjuan please fix this syntax error: https://travis-ci.org/otcshare/iotivity-node/jobs/119462483#L1478

[wanghongjuan]

@gabrielschulhof I have been fixed the syntax error, but My code failed to access the Travis CI build.