updated checks of environment with Rails.env by Rails.env methods

lib/discourse_hub.rb

@@ -42,7 +42,7 @@ module DiscourseHub
   end
 
   def self.hub_base_url
-    if Rails.env == 'production'
+    if Rails.env.production?
       'http://api.discourse.org/api'
     else
       ENV['HUB_BASE_URL'] || 'http://local.hub:3000/api'

lib/import/importer.rb

@@ -58,7 +58,7 @@ module Import
     rescue SystemExit
       log "Restore process was cancelled!"
       rollback
-    rescue Exception => ex
+    rescue => ex
       log "EXCEPTION: " + ex.message
       log ex.backtrace.join("\n")
       rollback

lib/scheduler/defer.rb

@@ -1,7 +1,7 @@
 module Scheduler
   module Deferrable
     def initialize
-      @async = Rails.env != "test"
+      @async = !Rails.env.test?
       @queue = Queue.new
       @mutex = Mutex.new
       @thread = nil