Fixes #23924 - Use consistent IDs for modules in webpack

This replaces the NamedModulesPlugin with a simplified version, that
strips the relative path part of the module ID up to the
node_modules/ part. This allows using consistent naming for modules,
even when running the packaging from different directories relative to...

Refs #23924 - replace HashModuleId with NamedModules

While this won't fix the issue, it will allow debugging which module is
causing the issue.

Refs #23511 - make webpack generated bundle reusable by plugins

use stable (hashed) module references instead of numbers

Fixes #23511 - Generate webpack plugins in context of vendor/bundle

Fixes #23365 - Silence the ENOENT error for .env

If .env doesn't exist, it can be safely ignored. This updates the
library to the newest version to simplify error handling. The 2.0.0 also
had a silent option, but that didn't allow for only hiding the ENOENT...

Fixes #23147 - Allow plugins to compile production webpack assets

Fixes #23222 - flatten breadcrumbs switcher fetched data

Fixes #23097 - Show npm postinstall errors

Fixes #23129 - Disable webpack source maps in production

Fixes #22711 - fix uglifyjs-webpack plugin

Fixes #22114 - Webpack common-chunk vendor.js

Use webpack-common-chunk-plugin to include all
required modules from node_modules/ into vendor.js

Fixes #22101 - Reduce lodash affect on the bundle

Using `lodash-webpack-plugin` and `babel-plugin-lodash`

Fixes #21563: add babel-plugin-transform-class-properties.

Add babel-plugin-transform-class-properties to the webpack config
so that we can transform es2015 static class variables into normal
JS.

http://projects.theforeman.org/issues/21563

Fixes #21462: Update babel preset to `env

Updating to the current recommended babel-preset-env to replace
the es20xx presets. This gives greater control over build targets
and makes ongoing maintenance easier.

http://projects.theforeman.org/issues/21462

Fixes #21180 - Enable adding 3rd party libraries from plugins

Fixes #21329 - Fix webpack build

Fixes #20469 - Register react components from plugins

Fixes #20511 - Webpack config should look for nested deps

The current value of resolve.modules in config/webpack.config.js is
"path.join....'node_modules'"".
This value doesn't work when dependencies have been installed using
global style (npm install --global-style true)....

Fixes #20295 - Sanitize webpack_directories json

refs #19478 - update webpack plugins for v3 compatability

refs #20097 - use relative path in webpack config

fixes #20097 - webpack support for foreman plugins

How to use:

in a plugin, create a directory call webpack
then inside a file called index.js put something like:

```
import React from 'react';
import ReactDOM from 'react-dom';
import Icon from 'foremanReact/common/Icon';...

refs #19478 - fixes webpack HOT server.

Live reload works again.

Fixes #19478 - migrate to webpack2

Fixes #18438 - control notifications polling

Fixes #18591 - powerStatus in redux

Fixes #18638 - add sass support to webpack

Fixes #18530 - fix package.json dependencies

Fixes #17977 - remove ES6-promise polyfill

Fixes #16682 - Compress webpack compiled assets

Fixes #17035 - removes webpack provider plugin

Refs #17491 - Revert "polyfill Map for ARMv8 node"

This reverts commit f101368449b450b1ede5c822af0852166c45bc4c.

Fixes #17491 - polyfill Map for ARMv8 node (#4059)

fixes #17236 - ensure source maps are available in dev env.

Fixes #13424 - c3 patternfly react implementation

Refs #16074 - Load .env when not running a Procfile

Loads .env file when Webpack is started from node_modules/.bin

Fixes #13748 - Add testing tools for code under webpack

This commit adds jest as a tool to be used to test some of the code
under webpack, supporting ES2015 via babel-polyfill.

The purpose of this is just to give the tools for other developers
to test their javascript code....

Fixes #16074 - Adds BIND variable to startup process

Instead of binding to 0.0.0.0 we default to localhost
and use ENV variable BIND to override.
This also introduces '.env' files which helps to set
other ENV variables

Fixes #16120 - Allow including css in webpack assets

This commit demonstrates using the css from the select2 module using the
webpack css loaders. Images under 32k will be compiled into the css to
reduce request counts.

Refs #12364 - Allow running webpack dev server on any hostname

Currently, SecureHeaders only allows running the webpack dev server from
localhost or 0.0.0.0, and only using http. This leads to issues when
attempting to run foreman inside a virtual machine or using https. This...

Fixes #12364 - Use NPM+Webpack to handle external assets

This commit introduces NPM and Webpack to handle external assets.
It also provides ES6 support and a live reload dev server that can be
used by running `foreman start` instead of `rails start`.
Do not forget to run `npm install` before starting the server....