GitLab

**Description**
Add failure check feature in data diagnosis.

**Major Revision**
- Add failure check rule op to support that if there exists metric_regex not been matched by any metric in result, label as failedtest
- Split performance issue and failedtest in categories


**Minor Revision**
- replace DataFrame.append() with pd.concat since append() will be removed in later version of pandas

**Description**
Add md and html output format for DataDiagnosis.

**Major Revision**
- add md and html support in file_handler
- add interface in DataDiagnosis for md and HTML output

**Minor Revision**
- move excel and json output interface into DataDiagnosis