LCOE Plot HoverTool

[kevybear]

The hover tool isn't working properly in that it is not showing the Group that the LCOE constituent belongs to (i.e. turbine, infra, opex)

I feel like it might be a bug in Bokeh but could use further research:

`hover.tooltips = OrderedDict([
("Component","@NAMEs"),
("Group", "@group")
])``

Above should work but it doesn't so instead, right now the("Group", "@Group") line is commented out and hovering over a bar only shows something like this:

Component: Nacelle

instead of

Component: Nacelle
Group: Turbine