Fix false positive error for no-runloop

[mkszepp]

fix #2150

Unfortunately, I have no experience with eslint rules yet, but this should solve our problem

[ef4]

This is probably the wrong place to fix this. The problem is that the rule is using a POJO:

https://github.com/ember-cli/eslint-plugin-ember/blob/bf4637b674454a69bb086ebec7ca1f0e942a146e/lib/rules/no-runloop.js#L78C39-L79C1

to store the mapping from local names to imported names, so it will always accidentally match methods that are present on Object.

Please just change that POJO to a Map and this extra check will not be needed.

[mkszepp]

@ef4 thanks for input. Tests do pass with this change. should we hold the added tests or can we safely remove?

[ef4]

I think the tests can stay, thanks.