Fixed some issues related to code break because current API returns an info object which doesn't have some properties so error report creation was breaking.
Fixed some issues related to code break because current API returns an info object which doesn't have some properties so error report creation was breaking.

mariusbuescher/grunt-w3c-html-validation,mariusbuescher/grunt-w3c-html-validation,vikash-bhardwaj/grunt-w3c-html-validation,vikash-bhardwaj/grunt-w3c-html-validation