Add more push rules to the API

Closes #493 and #948

See merge request !1022

Remove a custom validation in the LDAP Group link API

Closes #972

See merge request !1026

Disable LDAP permission override in project members edit list

Closes #1475

See merge request !1018

The validation is now done by Grape since 16a8b5c6.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Use EE build status badge in README

See merge request !1013

Expose issue weight on the API

Closes #749

See merge request !1023

Prevent 500 error when entering/uploading a license

See merge request !1016

Add tests to cycle analytics

See merge request !1019

Previously, if an admin clicked 'Upload license' without attaching
or entering a license, a 500 error would occur. Now, we check for
the right param. This also changed the render and return to a
redirect, which is more appropriate.

Closes #1475

ES doc. Add the explanation of what indexing option is

See merge request !1017

Make ES guide less confusing

Closes #1418

See merge request !992

Grapify the settings API

See merge request !1010

CE upstream

Closes #1451 and gitlab-ce#25827

See merge request !1000

Grapify the push rules API

See merge request !1005

Grapify the project git hooks API

See merge request !1006

Grapify the LDAP API

See merge request !1003

Grapify the LDAP group link API

See merge request !1002

About GitLab link in sidebar that links to help page

Closes gitlab-ce#24479

See merge request !1008

Grapify the license API

See merge request !1004

Check if user can read project before being assigned to issue

See merge request !1007

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