Added troubleshooting to migration doc

@jacobvosmaer any thoughts?

See merge request !1482

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Include full path of source and target branch names in New Merge Request page

The previous title on the New Merge Request page would only show the group name. which could be confusing. Before, if you attempted to create a new merge request within the repo, it might look like this:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/d300d3a362406628ffc7c8f2b5cc6b5d/image.png)

Since they are in the same repo, this MR just simplifies this to the branches:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/5d7b3efc2399b37f84ccfd42bd5d6e8d/image.png)

However, if you create a MR from a forked project, you now see the full namespace:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/7998c3d19e90d405f4634202cc7181c5/image.png)





Closes #2875

See merge request !1477

Note the original location of a moved project when notifying users of the move

https://dev.gitlab.org/gitlab/gitlabhq/issues/2536

See merge request !1463

Take advantage of `Devise.sign_in_after_reset_password`

Since we've updated our Devise dependency, we can take
advantage of this new-ish configuration setting and avoid
our hackish workaround.

See merge request !1475

Previous title would only show the group name, which could be confusing.

Closes #2875

Update docker guide and add docker-compose.yml

/cc @JobV @sytses 


See merge request !1473

Fixes english information paragraph in admin/applications view

See merge request !1470

Apache needs gitlab-git-http-server on TCP

[ci skip]

See merge request !1462

Bump Ruby and Golang versions

[ci skip]

See merge request !1467

Use data stored in projects instead of ci_projects

- It delegates name, path, gitlab_url, ssh_url_to_repo
- Remove ability to set this parameters using CI API

This fixes GitLab project rename, namespace change, repository rename, etc.

/cc @dzaporozhets 

See merge request !1404

Fix bug when removed file was not appearing in merge request diff

Finally we can see removed files in merge request diff ✨Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #2533 

See merge request !1471

Cleanup ci helpers

Part of #2594

See merge request !1466

Add a missing RAILS_ENV=production to fix crontab clearing in the CI migration guide

All other commands in the guide set this env var, but it's missing for the `whenever --clear-crontab` call and this causes it to not clear the crontab properly.

See merge request !1474

All other commands in the guide set this env var, but it's missing here
and this causes whenever not to clear the crontab file of gitab_ci
properly.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

- It delegates name, path, gitlab_url, ssh_url_to_repo
- Remove ability to set this parameters using CI API

This fixes GitLab project rename, namespace change, repository rename, etc.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Move CI project settings page to CE project settings area
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Part of #2594 

See merge request !1465