Add more enhancement for passing runtime variables for a blueprint launch

[abhijeetkaurav1st]

Right now, we are passing editable_params.py. Which is good enough for having python script and runtime variables both at same place. For getting started quickly, we can also add .var file to be passed that will contain runtime variables in yaml format.

Ex:

variable_list:
  - name: var1
     context: Profile/Service (Default can be profile)
     value: var1_value
  - name: var2
     value : var2_value

Or some other format for passing runtime variables