feat(limits-cmd): accept new limits:set value type

[zinuzoid]

Accept new cli format limits:set web=500m/2000m Value is map to requests/limits parameter in Kubernetes resource management. See https://github.com/deis/workflow/issues/562 e2e https://github.com/deis/workflow-e2e/pull/335 Requires https://github.com/deis/controller/pull/1118

[deis-bot]

@Joshua-Anderson, @ultimateboy and @bacongobbler are potential reviewers of this pull request based on my analysis of git blame information. Thanks @zinuzoid!

[Joshua-Anderson]

Overall looks good! Looks like limits_tests.go needs to be formatted with gofmt -s though. Thanks for the contribution!

[codecov-io]

Current coverage is 72.45% (diff: 100%)

Merging #263 into master will increase coverage by 0.02%

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[zinuzoid]

@Joshua-Anderson Thanks, I just notice now that make test didn't include test-style. Not sure if there's a reason for that. Anyway, this one is green now.

[kmala]

Tested manually and this looks good,

 deis limits:set web=10M/100M
Applying limits... done

=== syrupy-yeomanry Limits

--- Memory
web     10M/100M

--- CPU
Unlimited

deis limits:set web=100M
Applying limits... done

=== syrupy-yeomanry Limits

--- Memory
web     100M

--- CPU
Unlimited

[kmala]

It will be nice to add details of setting the value in the new way https://github.com/deis/workflow-cli/blob/master/parser/limits.go#L78-L89

[kmala]

Jenkins, Add to whitelist.