Improve the componentspecific model to use information from the component model

[marco-c]

The componentspecific model currently just takes as input the data from the bug and decides whether it should be moved out of Firefox:General or not.

A better approach would be to add the output of the component model as features (maybe the top-3 choices):

• top1 choice = Firefox::Component 1
• top1 score = 0.8
• top2 choice = Core::Component 2
• top2 score = 0.15
• top3 choice = Core::Component 7
• top3 score = 0.05

Then use the following as labels:

• keep in general
• use top1
• use top2
• use top3