Added browser tests after deploy

[quarckster]

What:
QE use library https://github.com/quarckster/widgetastic.patternfly4 to run UI tests in Selenium. In order to keep up the changes in this repo it would be nice to trigger a travis job with browser tests that are described here https://github.com/quarckster/widgetastic.patternfly4/tree/master/testing.

Solves #1315

[patternfly-build]

PatternFly-React preview: https://1312-pr-patternfly-react-patternfly.surge.sh

[coveralls]

Pull Request Test Coverage Report for Build 4581

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 31 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+1.5%) to 80.342%

---

Files with Coverage Reduction	New Missed Lines	%
packages/patternfly-4/react-core/src/components/Dropdown/Separator.js	1	80.0%
packages/patternfly-4/react-core/src/components/Dropdown/DropdownItem.js	4	34.52%
packages/patternfly-4/react-core/src/helpers/util.ts	26	14.29%

Totals
Change from base Build 4568:	1.5%
Covered Lines:	3361
Relevant Lines:	3918

---

💛 - Coveralls

[dgutride]

Wow - this is great, is there an open issue on github tracking this work so we can understand the impact (and how the PatternFly team can help with this effort)? We won't be able to accept this in without at least an issue created on this repo that relates to this. @quarckster

[quarckster]

@dgutride done

[dgutride]

Do you need us to set this token on travis? I see it has been set, but it needs to be set by somebody on the PF team so we can keep track of what is used. @karelhala @quarckster

[quarckster]

Yes, please set up this token in Travis settings. I've already provided token to @karelhala.

[dgutride]

@quarckster - this needs to be updated from mastser and then we can take it in

[quarckster]

@redallen please review

[quarckster]

@dgutride I rebased the PR and aligned it with @redallen comments.