Making a task which rebuilds test coverage for Node

[brandongk]

hard-coding the coverage file in the repo is non-indicative as the path is wrong (i.e. has ryanluker hard-coded).

The Python project matters less because the cov.xml file has relative paths anyways.

[ryanluker]

@brandongk60 closing this as we are doing away with the top score logic but replaced it with relative comparison logic.