Hammer CLI

Description of problem:
the parameters --organizations|--locations; --organization-ids|--location-ids obviously can't handle an empty string passed as a parameter. Despite the resulting message is "Domain updated".

Version-Release number of selected component (if applicable):
hammer-cli 0.8.0
hammer-cli-foreman 0.8.0
foreman 1.13.0

Steps to Reproduce:

# hammer -u admin -p changeme domain info --id 7
Id:          7
Name:        rplevka_dom_3
Description: 
DNS Id:      
Subnets:     

Parameters:  

Created at:  2016/10/17 11:08:16
Updated at:  2016/10/17 11:08:16

# hammer -u admin -p changeme domain update --id 7 --location-ids="2,4" 
Domain [rplevka_dom_3] updated

# hammer -u admin -p changeme domain info --id 7
Id:          7
Name:        rplevka_dom_3
Description: 
DNS Id:      
Subnets:     

Locations:   
    Default Location
    rplevka_loc
Parameters:  

Created at:  2016/10/17 11:08:16
Updated at:  2016/10/17 11:08:16

# hammer -u admin -p changeme domain update --id 7 --location-ids="4" 
Domain [rplevka_dom_3] updated

# hammer -u admin -p changeme domain info --id 7
Id:          7
Name:        rplevka_dom_3
Description: 
DNS Id:      
Subnets:     

Locations:   
    rplevka_loc
Parameters:  

Created at:  2016/10/17 11:08:16
Updated at:  2016/10/17 11:08:16

# hammer -u admin -p changeme domain update --id 7 --location-ids="" 
Domain [rplevka_dom_3] updated

# hammer -u admin -p changeme domain info --id 7
Id:          7
Name:        rplevka_dom_3
Description: 
DNS Id:      
Subnets:     

Locations:   
    rplevka_loc
Parameters:  

Created at:  2016/10/17 11:08:16
Updated at:  2016/10/17 11:08:16