Uses findMetroConfig and fetchMetroConfig in the internal RN cli
Uses findMetroConfig and fetchMetroConfig in the internal RN cli

Reviewed By: davidaurelio

Differential Revision: D6819226

fbshipit-source-id: 6436855cc5dce9ce7922d89df99c3cb90abb095e

facebook/react-native,exponentjs/react-native,facebook/react-native,exponent/react-native,hoangpham95/react-native,hoangpham95/react-native,hammerandchisel/react-native,myntra/react-native,exponent/react-native,javache/react-native,facebook/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hammerandchisel/react-native,hoastoolshop/react-native,janicduplessis/react-native,exponent/react-native,javache/react-native,exponent/react-native,myntra/react-native,janicduplessis/react-native,arthuralee/react-native,facebook/react-native,javache/react-native,exponentjs/react-native,janicduplessis/react-native,hammerandchisel/react-native,exponent/react-native,hammerandchisel/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hoangpham95/react-native,hoastoolshop/react-native,exponentjs/react-native,facebook/react-native,exponent/react-native,exponentjs/react-native,facebook/react-native,hoastoolshop/react-native,arthuralee/react-native,javache/react-native,janicduplessis/react-native,hoangpham95/react-native,javache/react-native,janicduplessis/react-native,pandiaraj44/react-native,facebook/react-native,hoastoolshop/react-native,pandiaraj44/react-native,janicduplessis/react-native,arthuralee/react-native,janicduplessis/react-native,javache/react-native,hoangpham95/react-native,exponentjs/react-native,hammerandchisel/react-native,pandiaraj44/react-native,pandiaraj44/react-native,javache/react-native,hoangpham95/react-native,hoastoolshop/react-native,exponentjs/react-native,hoangpham95/react-native,myntra/react-native,myntra/react-native,arthuralee/react-native,exponent/react-native,myntra/react-native,myntra/react-native,javache/react-native,exponent/react-native,arthuralee/react-native,exponentjs/react-native,pandiaraj44/react-native,pandiaraj44/react-native,javache/react-native,myntra/react-native,hoangpham95/react-native,facebook/react-native,hoastoolshop/react-native,hoastoolshop/react-native,myntra/react-native,hoastoolshop/react-native,myntra/react-native,exponentjs/react-native,janicduplessis/react-native,facebook/react-native