This reporter can be used to publish newman run to postman.

1. Moved upload-run to helpers folder
2. Code cleanup
3. Better error messages

1. Changed fallback error message
2. Changed POSTMAN_API_BASE_URL to latest domain
3. Modified regex patterns to comply with both old and new domain
4. Modified _buildResponseObject to use response.text()

…t uids and apikey from postman reporter.

This info will now be stored in options which is sent to the reporter.
Moved utility functions to extract the above from postman reporter to newman util.
Added test cases for the utility functions.
Cleanup for existing tests based on above.