Prepare message for a decent D8 release.

[RoySegall]

I'm continuing @jhedstrom work. What left:

• Check with the new html display we don't have xss when don't need to
• Make sure the view works similar to d7
• Fix the VBO integration(broken for now)
• Try to replace the current test in unit test/kernel base tests(similar to the work on http://github.com/amitaibu/og)
• Fix tests

Once we got this we can have a first release for D8.

[amitaibu]

I think it would be better to break this to smaller PRs

[RoySegall]

Sure. This PR just set up the basics. I'll open a follow up issues later on.

[amitaibu]

@RoySegall issue title seems to no longer be correct?

[mccrodp]

Check with the new html display we don't have xss when don't need to
Not sure what is needed here or where this occurs in code / display

Make sure the view works similar to d7
Tried this again with no luck so far, see: #30
Any examples of this in contrib? i.e. -

1 A route with defined route name and path
2 A view with config overriding that exact path

Fix the VBO integration(broken for now)
Fixed this in PR: #44

Try to replace the current test in unit test/kernel base tests(similar to the work on http://github.com/amitaibu/og)
Not sure what is needed here either or what part of OG code is being referred to.

I also added the following PRs which are pretty important for a stable release too I believe:

• Update MessageType and MessageTypeInterface parent classes #41 - Update Message parent classes (finished)
• Make message twig template discoverable #43 - Make twig templates discoverable
• Fix Uninstall process: Delete all message settings in install hook #45 - Fix uninstall hook (finished)

[RoySegall]

@mccrodp I can see you did some work on the PRs but the tests are still failing and not requested again the update-travis branch.

Let's start with a simple PR that fixing the tests and then go over the other PRs.

[mccrodp]

@RoySegall / @jhedstrom - Ok, please see #46 re diff, then I can create a PR to address the tests.

[mccrodp]

@RoySegall - Please check this PR: #47 - all tests are green again.

[jhedstrom]

Unless I'm missing something, #48 and #49 appear to be ready.

[RoySegall]

@jhedstrom Can you handle #55? Then i'll merge it and close the PR.

[RoySegall]

OK. Most of the work is covered and this PR got very big. Merge this one and any other fix will be done in a follow PR.

10x for the work everyone!