* [ADF-1958] Process Attachment list - The empty list should be a simple template
* changed the default empty list to a simple template
* changed process-attachment.component.html so that the user can pass custom empty tempate
* [ADF-1958] Process Attachment list - The empty list should be a simple template
* changed the default empty list to a simple template
* changed process-attachment.component.html so that the user can pass custom empty tempate
* removed some unused variables
* [ADF-1958] Process Attachment list - The empty list should be a simple template
* changed the default empty list to a simple template
* changed process-attachment.component.html so that the user can pass custom empty tempate