theforeman / foreman / 11255

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develop: 68%

Pull #5600

travis-ci

Fixes #23665 - Use Patternfly charts in host#show

The flot package is deprecated although it's being used
to plot charts in Foreman.

In this commit:

 - Added TimeseriesChart that uses Patternfly's LineChart
   under common/charts
 - Added HostChart under hosts
 - Rendered HostChart for runtime and resources
   in "hosts/show.html.erb"
 - Added unit tests
 - Removed unnecessary files such as "hosts/_runtime.html.erb"
 - Changed routes "hosts/:name/{runtime,resources}" to
   render JSON

Signed-off-by: Boaz Shuster <boaz.shuster.github@gmail.com>

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