Created attachment 669601 [details]
Quantum CLI output vs Nova output

Description of problem:

Qunatum CLI help usage is not friendly / intuitive.

There are few issues with the CLI help:

1. too much output like :
- output formatters 
- positional arguments:
- shell formatter 

2. There is no explain on what values are used like :
-admin-state-down -  No explain about ( True | False ) 

3. addtional info which relates to the plugin used is not added , like 

--provider:network_type vlan 
--providerhysical_network <phys-net-name> 
--provider:segmentation_id <VID>

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


How reproducible:


Steps to Reproduce:
1. run quantum net-create --help and check if it is easy to see 
- vlans 
- dns server add list
- DHCP disable option 
and others options 
2. IMHO when using plugings its commands should be added automatically
3. Attached Nova network CLI command output vs Quantum network CLI 

This is also apply to horizon where lots of options are missing 
  
Actual results:


Expected results:


Additional info: