Description of problem: hammer subnet create doesn't set the default organization/location. If this is expected behavior this should be documented in a hammer.

Version-Release number of selected component (if applicable): 6.3.2

How reproducible: Always

# hammer organization list 
---|--------|--------|-------------|--------|------------
ID | TITLE  | NAME   | DESCRIPTION | LABEL  | DESCRIPTION
---|--------|--------|-------------|--------|------------
1  | Redhat | Redhat |             | Redhat |            
---|--------|--------|-------------|--------|------------

Steps to Reproduce:
1. Create Default for an organization
  # hammer defaults add --param-name organization_id --param-value 1
  # hammer defaults list
    ----------------|------
    PARAMETER       | VALUE
    ----------------|------
    organization_id | 1    
    ----------------|------

2. Create Subnet
  # hammer subnet create --name test --network 192.168.22.0 --mask 255.255.255.0
    Subnet created

3. Get Subnet Info, here we can see that organization is not set for the subnet
  # hammer subnet info --name test 
    Id:            20
    Name:          test
    Network:       192.168.22.0
    Mask:          255.255.255.0
    VLAN ID:       
    Priority:      
    DNS:           
    Primary DNS:   
    Secondary DNS: 
    TFTP:          
    DHCP:          
    IPAM:          None
    Gateway:       
    From:          
    To:            
    Domains:  

Actual results: Default organization is not assigned to subnet

Expected results: Default organization should be set automatically to the subnet when the subnet is created. 

Note** If the current behavior is expected then it should be added into the hammer documentation.