Merge jubianchi-api/improve-error-reporting

Closes https://github.com/gitlabhq/gitlabhq/pull/7502

See merge request !1112

Gitlab::GitAccess tests

Fixes #1616

See merge request !1113

evaluate -> execute_script when return not needed.

evaluate_script history -> go_back and go_forward.

Factor current_url + URI.path into current_path.

Merge branch 'api/improve-error-reporting' of https://github.com/jubianchi/gitlabhq into jubianchi-api/improve-error-reporting

Fix not rendered the network graph edges

set the collation to utf8_general_ci

Factor .add-diff-note active state.

Replace javascript:; links with buttons.

Prevent 500 error on search results if description contains relative link

Bug: If I add relative link to comment or description and search for it - I get 500 error on search page.

Reason for this is that we use `@repository` variable. But for pages like search it does not assigned.
In future we should avoid using such variables. Especially in markdown parser that can be used on different pages

Fixes #1601

See merge request !1111

Increase unicorn timeout

From 30 seconds to 60 seconds

Fixes #1579

See merge request !1110

Fix 500 when viewing diff if a file changed permission

Fixes #1613

See merge request !1109

Fix MR commenting system when new commits pushed

Fixes #1608

This conmmit fixes wierd behaviour when you see wrong comments about new
commits in merge requests.

Short explanation of a bug:
When you push new commits to project we updated `project.merge_requests`
with comment about push. But `project.merge_requests` includes also
merge requests from forks to origin project. So when you push to master
branch it commented on all merge requests from forks to origin where
source_branch was `master`

See merge request !1108

Fix ref parsing in Gitlab::GitAccess

See merge request !1107

This conmmit fixes wierd behaviour when you see wrong comments about new
commits in merge requests.

Short explanation of a bug:
When you push new commits to project we updated `project.merge_requests`
with comment about push. But `project.merge_requests` includes also
merge requests from forks to origin project. So when you push to master
branch it commented on all merge requests from forks to origin where
source_branch was `master`

Use FileUtils to delete instead of File

Add to monthly doc that reverting is an option

See merge request !1106

[UI] Set textarea resize:vertical by default.

[refactor] Factor out commit list from compare and new MR.

Fix link_to_reply_diff.

Factor issue and MR edit form error list.

Factor error and success methods from services.

cleanup empty repo page