Bug 1380504

Description of problem:
I have a Service Dialog with a Text Box on it.
When a Default Value is set, this will override any result returned by the dynamic method (specified by the Entry Point). Shouldn't this be the other way round?

Version-Release number of selected component (if applicable):
5.6.1.2.20160810181333_8ba817b

How reproducible:
Always

Steps to Reproduce:
1. Create a Service Dialog and associate it to a button on a VM
2. On the dialog, create a Text Box and set a default value
3. Click Dynamic and set an Entry Point method (example bellow)
4. From the VM screen, click on the button

Actual results:
The field will be populated with the default value, ignoring your Dynamic method result.

Expected results:
The default value should be overriden by the value returned by the Dynamic method

Additional info:
When removing the default value from the field, the field is populated with the result from the Dynamic method.

Example of a dynamic method (used to return the VM in context to populate the limit field):

vm_name = $evm.root['dialog_vm_name']
if vm_name.nil? || vm_name.length.zero?
    unless $evm.root['vm'].nil?
	    vm_name = $evm.root['vm'].name
    end
end

unless vm_name.nil? || vm_name.length.zero?
	limit = $evm.object
	limit["data_type"] = "string"
	limit["required"] = "true"
	limit["value"] = vm_name
end