Default enableBabelRCLookup (recursive) to false
Default enableBabelRCLookup (recursive) to false

Summary:
This is a breaking change that tells Metro to look at only the project's .babelrc file. Previously it would look at .babelrc files under node_modules and would run into issues because it didn't have the version of Babel nor the plugins/presets that `node_modules/randompackage/.babelrc` wanted. So as a workaround, people would write a postinstall step that deletes `node_modules/**/.babelrc`, which worked well. This flag (`getEnableBabelRCLookup = false`) has the same effect and hopefully fixes one source of cryptic bugs people run into.

To use the old behavior, create a config file named `rn-cli.config.js` with:
```js
module.exports = {
  getEnableBabelRCLookup() {
    return true;
  },
};
```

Go under node_modules, modify a used module to have a dummy .babelrc (`{"plugins": ["dummy"]}`) and ensure the JS bundle still loads.
Closes https://github.com/facebook/react-native/pull/15860

Differential Revision: D5798264

Pulled By: jeanlauliac

fbshipit-source-id: ce368b1d5671cc6c6261cbe3c39e61c9401fe37a

janicduplessis/react-native,Bhullnatik/react-native,exponent/react-native,janicduplessis/react-native,facebook/react-native,exponentjs/react-native,myntra/react-native,frantic/react-native,frantic/react-native,exponent/react-native,frantic/react-native,janicduplessis/react-native,facebook/react-native,cdlewis/react-native,hoastoolshop/react-native,jevakallio/react-native,kesha-antonov/react-native,hoangpham95/react-native,exponent/react-native,javache/react-native,jevakallio/react-native,exponentjs/react-native,hammerandchisel/react-native,hammerandchisel/react-native,cdlewis/react-native,jevakallio/react-native,hammerandchisel/react-native,pandiaraj44/react-native,rickbeerendonk/react-native,janicduplessis/react-native,jevakallio/react-native,myntra/react-native,hoangpham95/react-native,exponent/react-native,dikaiosune/react-native,jevakallio/react-native,pandiaraj44/react-native,Bhullnatik/react-native,dikaiosune/react-native,rickbeerendonk/react-native,myntra/react-native,Bhullnatik/react-native,hammerandchisel/react-native,dikaiosune/react-native,javache/react-native,arthuralee/react-native,janicduplessis/react-native,jevakallio/react-native,kesha-antonov/react-native,rickbeerendonk/react-native,jevakallio/react-native,pandiaraj44/react-native,hoastoolshop/react-native,javache/react-native,facebook/react-native,myntra/react-native,kesha-antonov/react-native,javache/react-native,hoangpham95/react-native,facebook/react-native,hammerandchisel/react-native,javache/react-native,ptmt/react-native-macos,arthuralee/react-native,arthuralee/react-native,cdlewis/react-native,cdlewis/react-native,facebook/react-native,exponent/react-native,rickbeerendonk/react-native,pandiaraj44/react-native,exponentjs/react-native,Bhullnatik/react-native,ptmt/react-native-macos,ptmt/react-native-macos,hammerandchisel/react-native,hoastoolshop/react-native,myntra/react-native,exponentjs/react-native,Bhullnatik/react-native,exponent/react-native,janicduplessis/react-native,dikaiosune/react-native,dikaiosune/react-native,pandiaraj44/react-native,Bhullnatik/react-native,javache/react-native,myntra/react-native,hoastoolshop/react-native,janicduplessis/react-native,cdlewis/react-native,exponentjs/react-native,hoangpham95/react-native,kesha-antonov/react-native,kesha-antonov/react-native,hammerandchisel/react-native,hoangpham95/react-native,Bhullnatik/react-native,ptmt/react-native-macos,hoangpham95/react-native,arthuralee/react-native,janicduplessis/react-native,exponentjs/react-native,hoangpham95/react-native,myntra/react-native,hammerandchisel/react-native,javache/react-native,jevakallio/react-native,facebook/react-native,javache/react-native,rickbeerendonk/react-native,ptmt/react-native-macos,myntra/react-native,frantic/react-native,rickbeerendonk/react-native,facebook/react-native,pandiaraj44/react-native,kesha-antonov/react-native,ptmt/react-native-macos,cdlewis/react-native,ptmt/react-native-macos,rickbeerendonk/react-native,exponentjs/react-native,exponent/react-native,hoastoolshop/react-native,kesha-antonov/react-native,dikaiosune/react-native,hoangpham95/react-native,hoastoolshop/react-native,frantic/react-native,dikaiosune/react-native,exponent/react-native,myntra/react-native,cdlewis/react-native,pandiaraj44/react-native,kesha-antonov/react-native,facebook/react-native,javache/react-native,rickbeerendonk/react-native,cdlewis/react-native,facebook/react-native,pandiaraj44/react-native,kesha-antonov/react-native,exponentjs/react-native,arthuralee/react-native,cdlewis/react-native,rickbeerendonk/react-native,jevakallio/react-native,dikaiosune/react-native,hoastoolshop/react-native,ptmt/react-native-macos,hoastoolshop/react-native,Bhullnatik/react-native