Progress bar with multiple bars doesn't pass scope variables to bars

[blessingc]

When I use it works correctly, but when I use it won't take what I specify in the "max" scope. It only uses 100 as the max.

In my plunker you'll see I have each bar set to 50, and the max set to 500, but the whole bar is already full.
http://embed.plnkr.co/N5JEOPFOHo44jktPp8kt/preview

I guess it makes sense if you assume it's percentages instead of just values, but the full progressbar doesn't work that way so I figured this wouldn't work that way either.

[groupsky]

Possible duplication of #3618

[wesleycho]

Ah, missed this issue - this sounds like a duplicate of #3618, which is now fixed in master