Support multiple environments for sentry

Change-Id: I2db87d41b9302692a14822c1b5dc9c7a385a2b61
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/254540
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Ethan Vizitei <evizitei@instructure.com>
QA-Review: Jacob Burroughs <jburroughs@instructure.com>
Product-Review: Jacob Burroughs <jburroughs@instructure.com>

config/initializers/sentry.rb

@@ -30,6 +30,7 @@ if settings.present?
     config.logger = Rails.logger
     config.silence_ready = true
     config.dsn = settings[:dsn]
+    config.current_environment = Canvas.environment
     config.tags = settings.fetch(:tags, {}).merge('canvas_revision' => Canvas.revision)
     config.release = Canvas.revision
     config.sanitize_fields += Rails.application.config.filter_parameters.map(&:to_s)

lib/canvas.rb

@@ -332,4 +332,8 @@ module Canvas
   def self.cluster
     nil
   end
+
+  def self.environment
+    Rails.environment
+  end
 end