update protractor version to 0.17.0
some refactor to support multifile_browser
adding test to new functionality added to multi file browser.
Merge branch 'file_browser_bar' of github.com:mulesoft/api-designer into file_browser_bar
adding helpers to new functionality added to multi file browser.
adding support for file-browser-bar to saucelabs tests
updating protractor.config.js to support browser popup.
and adding some tests to file-browser.js