Fixed install/update of gems for template.

- Was getting conflicts with the SASS gem where `bundle install` would
  not work but `bundle update` would.
- The initial `bundle install` is done via the Rails Slim Template
  while the Rails Setup Template performs a follow-up `bundle update`
  to complete the setup process.
Removed web console custom configuration for development environment.

- These settings are no longer supported by web console.