Add refresh_values option to get_field to turn off the calling to Rba…

…c when it is not necessary.

https://bugzilla.redhat.com/show_bug.cgi?id=1318825

app/models/miq_request_workflow.rb

@@ -284,34 +284,34 @@ def provisioning_tab_list
     tab_list
   end
 
-  def get_all_dialogs
-    @dialogs[:dialogs].each_key { |d| get_dialog(d) }
+  def get_all_dialogs(refresh_values = true)
+    @dialogs[:dialogs].each_key { |d| get_dialog(d, refresh_values) }
     @dialogs[:dialogs]
   end
 
-  def get_dialog(dialog_name)
+  def get_dialog(dialog_name, refresh_values = true)
     dialog = @dialogs.fetch_path(:dialogs, dialog_name.to_sym)
     return {} unless dialog
 
-    get_all_fields(dialog_name)
+    get_all_fields(dialog_name, refresh_values)
     dialog
   end
 
-  def get_all_fields(dialog_name)
+  def get_all_fields(dialog_name, refresh_values = true)
     dialog = @dialogs.fetch_path(:dialogs, dialog_name.to_sym)
     return {} unless dialog
 
-    dialog[:fields].each_key { |f| get_field(f, dialog_name) }
+    dialog[:fields].each_key { |f| get_field(f, dialog_name, refresh_values) }
     dialog[:fields]
   end
 
-  def get_field(field_name, dialog_name = nil)
+  def get_field(field_name, dialog_name = nil, refresh_values = true)
     field_name = field_name.to_sym
     dialog_name = find_dialog_from_field_name(field_name) if dialog_name.nil?
     field = @dialogs.fetch_path(:dialogs, dialog_name.to_sym, :fields, field_name)
     return {} unless field
 
-    if field.key?(:values_from)
+    if field.key?(:values_from) && refresh_values
       options = field[:values_from][:options] || {}
       options[:prov_field_name] = field_name
       field[:values] = send(field[:values_from][:method], options)