Fixes #20902: ensure 'katello' is webpack bundle name.

We were removing the bundle name for katello and thus making it
difficult to reference the katello bundle. This commit changes the
script to ensure that the katello bundle name is retained.

http://projects.theforeman.org/issues/20902

Fixes #20835 - added time into foreman-debug

Fixes #20312: Use bundler_ext in production for webpack plugin

Fixes #16160 - added start-foreman-dev helper

Fixes #20211 - Run js tests if webpack config changes

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';...

Fixes #17749 - Remove confusing .gz.txt extension from logs

Currently .txt extension is appended to log files that are processed
by foreman-debug and added to the debug archive. This is confusing to
the user.

This PR gets rid of the .txt extension, and also removes .gz/.bz2/xz...

Fixes #19497 - More passenger info in foreman-debug

Fixes #17771 - Test if rsync successfully uploaded tarball

Fixes #17770 - Preserve timestamps for collected files.

Uses `touch -r` to use the source file/dir as a reference and
replicate timestamps over to the file collected inside
foreman-debug archive.