Bump fog-openstack, rspec-rails and fog-core (#8877)

Bumps [fog-openstack](https://github.com/fog/fog-openstack), [rspec-rails](https://github.com/rspec/rspec-rails) and [fog-core](https://github.com/fog/fog-core). These dependencies needed to be updated together.

Updates `fog-openstack` from 0.3.6 to 1.0.3
- [Release notes](https://github.com/fog/fog-openstack/releases)
- [Changelog](https://github.com/fog/fog-openstack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fog/fog-openstack/compare/v0.3.6...v1.0.3)

Updates `rspec-rails` from 3.7.2 to 3.8.0
- [Release notes](https://github.com/rspec/rspec-rails/releases)
- [Changelog](https://github.com/rspec/rspec-rails/blob/master/Changelog.md)
- [Commits](https://github.com/rspec/rspec-rails/compare/v3.7.2...v3.8.0)

Updates `fog-core` from 1.45.0 to 2.1.2
- [Release notes](https://github.com/fog/fog-core/releases)
- [Changelog](https://github.com/fog/fog-core/blob/master/changelog.md)
- [Commits](https://github.com/fog/fog-core/compare/v1.45.0...v2.1.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Gemfile

@@ -16,8 +16,8 @@ gem 'pghero', '~> 2.2'
 gem 'dotenv-rails', '~> 2.2', '< 2.3'
 
 gem 'aws-sdk-s3', '~> 1.20', require: false
-gem 'fog-core', '~> 1.45'
-gem 'fog-openstack', '~> 0.3', require: false
+gem 'fog-core', '~> 2.1'
+gem 'fog-openstack', '~> 1.0', require: false
 gem 'paperclip', '~> 6.0'
 gem 'paperclip-av-transcoder', '~> 0.6'
 gem 'streamio-ffmpeg', '~> 3.0'
@@ -100,7 +100,7 @@ group :development, :test do
   gem 'i18n-tasks', '~> 0.9', require: false
   gem 'pry-byebug', '~> 3.6'
   gem 'pry-rails', '~> 0.3'
-  gem 'rspec-rails', '~> 3.7'
+  gem 'rspec-rails', '~> 3.8'
 end
 
 group :production, :test do