Allow RAILS_ENV to override default environment of 'production'

MSP-10964

lib/metasploit/framework/parsed_options/base.rb

@@ -85,14 +85,16 @@ class Metasploit::Framework::ParsedOptions::Base
       options.database.disable = false
       options.database.migrations_paths = []
 
+      # If RAILS_ENV is set, then it will be used, but if RAILS_ENV is set and the --environment option is given, then
+      # --environment value will be used to reset ENV[RAILS_ENV].
+      options.environment = ENV['RAILS_ENV'] || DEFAULT_ENVIRONMENT
+
       options.framework = ActiveSupport::OrderedOptions.new
       options.framework.config = nil
 
       options.modules = ActiveSupport::OrderedOptions.new
       options.modules.path = nil
 
-      options.environment = DEFAULT_ENVIRONMENT
-
       @options = options
     end