[WIP][TestBundle] introduce a standalone test-bundle to make testing with Pimcore and Behat easier

[dpfaffenbauer]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no

Todos:

Setup Context

• [x] sites
  • [x] add a site
  • [x] add domains to site
• [ ] documents
  • [x] adding documents
  • [ ] adding editables to documents
  • [ ] deleting documents
• [x] objects
  • [x] publish object
  • [x] setting values
• [x] classes
  • [x] adding classes
  • [x] adding fields to classes
  • [x] setting class properties
  • [x] bricks
  • [x] field collections
• [ ] assets
  • [ ] adding asset
  • [ ] delete asset
• [ ] redirects
• [ ] targeting

UI Context

• [ ] documents
  • [ ] links
  • [ ] hardlink
  • [ ] pages
  • [ ] snippets
  • [ ] folders
• [ ] document content