Improvements to Task Overview on Task page

[Calvinp]

• Removes taskId header on task page
• Moves buttons (JSON, Kill task) to be in line with the breadcrumbs containing requestId and deployId
• Adds instance number to those breadcrumbs.
• Adds hostName to taskOverview well.
• Changes task status in taskOverview well into a label.
• Puts exit reason on the taskOverview well on its own line

[ssalinas]

Since it is no longer up top, can we get the rackId in another box down on the info section of the page? Unescaped version should be available in task.RackId . Other than that, looks good

[ssalinas]

Thanks for working with me on this @Calvinp , new task header section looks good