Description of problem:

  Creating a new rule with min_size > max_size succeeds

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


How reproducible: always


Steps to Reproduce:
1. Create a new rule via crush_rule API by specifying min_size > max_size

    {
        "id": 3, 
        "name": "replicated_ruleset_kdsjf", 
        "ruleset": 0, 
        "type": "replicated", 
        "min_size": 100, 
        "max_size": 10, 
        "steps": [
           :
           :
  
Actual results:
new crush rule is created successfully

Expected results:
new crush rule should not be created and should display error message indicating min_size > max_size.

Additional info: