[11.9] Revert "Remove HipChat integration from GitLab"

See merge request gitlab-org/gitlab-ce!27257

Fixes gitlab-org/gitlab-ce#42595

Partially addresses #47424.

`nil` value is not included in
`ActiveModel::Type::Boolean::FALSE_VALUES` which caused that in Rails 5
the boolean_accessor converted `nil` to `true` instead of `false`.

In Rails 5.0 the `ActiveRecord::ConnectionAdapters::Column::TRUE_VALUES`
constant has been removed [1] and the remaining `FALSE_VALUES` constant
has been moved to `ActiveModel::Type::Boolean` [2]

[1]: https://github.com/rails/rails/commit/a502703c3d2151d4d3b421b29fefdac5ad05df61
[2]: https://github.com/rails/rails/commit/9cc8c6f3730df3d94c81a55be9ee1b7b4ffd29f6

[10.6] Prevent notes on confidential issues from being sent to chat

See merge request gitlab/gitlabhq!2366
# Conflicts:
#	app/helpers/services_helper.rb

Removes confusing/unnecessary checkboxes when trying to configure an
integration. If there is only one supported event we don't need to
allow these to be individually disabled since the integration can be
disabled instead.

E.g. Project Integrations for GitHub, Bugzilla, Asana, Pipeline emails and Gemnasium

Allows integrations to override which triggers are configurable

Merge branch 'security-10-3-do-not-expose-passwords-or-tokens-in-service-integrations-api' into 'security-10-3'

Filter out sensitive fields from the project services API

See merge request gitlab/gitlabhq!2281

(cherry picked from commit 476f2576444632f2a9a61b4cead9c1077f2c81d7)

2bcbbda0 Filter out sensitive fields from the project services API

This cop has been renamed to ActiveRecordSerialize to match the way
"ActiveRecord" is usually written.

This Cop blacklists the use of ActiveRecord's "serialize" method, except
for cases where we already use this.

Douwe Maan authored 7 years ago and Bob Van Landuyt :neckbeard: committed 7 years ago

Rename `build_events` to `job_events`

Closes #31620

See merge request !11287

This reverts merge request !11287