This matches the version used in Gitaly, bumps the gRPC version to be
aligned with GitLab CE/EE, and adds gRPC interceptor support:
https://gitlab.com/gitlab-org/labkit-ruby/compare/v0.2.0...v0.3.0

See http://asciidoctor.org/docs/user-manual/#include-directive

Bump omniauth_openid_connect to 0.3.1

See merge request gitlab-org/gitlab-ce!29387

Fix whitespace in specs because normalize_ws is slightly
different from Capybara 2 behavior

In https://gitlab.com/gitlab-org/gitlab-ce/issues/62208, users were
seeing 404 errors when they configured their OpenID provider without a
name parameter since OmniAuth would use the name `openidconnect` instead
`openid_connect`.

https://github.com/m0n9oose/omniauth_openid_connect/pull/23 makes the
default parameter `openid_connect` so this additional initializer in
GitLab is not necessary. Plus, this change enables users to use multiple
OpenID Connect providers if they desire.

Signed-off-by: Rémy Coutable <remy@rymai.me>

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13460

This gem allows you to get the `EXPLAIN ANALYZE` query plan, directly
from the Rails console.

The gem is installed with `require: false`, but if it was loaded on
launch, this would be it's memory load:

```
TOP: 145.3086 MiB
  rails/all: 22.4844 MiB
  ...
  activerecord-explain-analyze: 2.9648 MiB
    active_record/connection_adapters/postgresql_adapter: 2.9648 MiB
      pg: 2.9648 MiB
        pg_ext: 2.9648 MiB
  ...
```

It assures that requests are aborted after 60 seconds, otherwise
an exception is raised. This exception is logged by Sentry, also
there is a Prometheus counter for measuring number of requests in each
state.