Convert Tooltip component to Typescript

[dtaylor113]

Convert Tooltip component to Typescript.
Update unit and system integration tests.

Addresses #2212

[patternfly-build]

PatternFly-React preview: https://2216-pr-patternfly-react-patternfly.surge.sh

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@263c572). Click here to learn what that means.
The diff coverage is 91.66%.

@@            Coverage Diff            @@
##             master    #2216   +/-   ##
=========================================
  Coverage          ?   79.96%           
=========================================
  Files             ?      669           
  Lines             ?     8550           
  Branches          ?      732           
=========================================
  Hits              ?     6837           
  Misses            ?     1362           
  Partials          ?      351

Flag	Coverage Δ
#patternfly3	85.23% <ø> (?)
#patternfly4	75.08% <91.66%> (?)
#patternflymisc	95.79% <ø> (?)

Impacted Files	Coverage Δ
...ly-4/react-core/src/components/Popover/Popover.tsx	62.96% <ø> (ø)
...rnfly-4/react-core/src/components/Tooltip/index.ts	100% <100%> (ø)
...act-core/src/components/Tooltip/TooltipContent.tsx	100% <100%> (ø)
...react-core/src/components/Tooltip/TooltipArrow.tsx	80% <80%> (ø)
...ly-4/react-core/src/components/Tooltip/Tooltip.tsx	84% <92.85%> (ø)

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[dtaylor113]

@redallen, any idea why all CI tests are failing with '...exited with 127.'? They all work locally for me. -thanks.
UPDATE: Ok, I see #2287 which maybe to address these failures

[redallen]

@dtaylor113 Yep, Travis decided to stop caching inter-job dist directories randomly yesterday, so I'm in the process of moving everything to CircleCI now. I'll let you know when it's in and you can rebase.

[kmcfaul]

Any idea why the snapshot updated to Unknown?

[dtaylor113]

yes, I saw that as well, I do not know, I thought it might have to do with the unit test using const view = shallow(...

[dtaylor113]

Hi @redallen, resolved merge conflicts, PR should be ready for review (again :-) -thanks

[patternfly-build]

PatternFly-React preview: https://patternfly-react-pr-2216.surge.sh