UIManager no longer triggers RCTLogError
UIManager no longer triggers RCTLogError

Summary: Demote "Unable to find module UIManager" red box error to a warning

Reviewed By: fkgozali

Differential Revision: D16417458

fbshipit-source-id: ae70dffe419580f852db684a2665ccba2038da24

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