Hammer CLI

Lots of the help results for 'location' should have text that is a little more applicable to the specified subcommand.

Steps to Reproduce:
1. hammer -u admin -p admin location --help

Actual results:
<pre>
Usage:
hammer location [OPTIONS] SUBCOMMAND [ARG] ...

Parameters:
SUBCOMMAND subcommand
[ARG] ... subcommand arguments

Subcommands:
remove_medium Disassociate a resource
remove_configtemplate Disassociate a resource
remove_environment Disassociate a resource
remove_smartproxy Disassociate a resource
add_computeresource Associate a resource
list List all locations
add_medium Associate a resource
add_configtemplate Associate a resource
update Update a location
add_environment Associate a resource
remove_subnet Disassociate a resource
remove_organization Disassociate a resource
remove_domain Disassociate a resource
remove_user Disassociate a resource
delete Delete a location
remove_hostgroup Disassociate a resource
add_smartproxy Associate a resource
add_subnet Associate a resource
add_organization Associate a resource
add_domain Associate a resource
add_user Associate a resource
create Create a location
add_hostgroup Associate a resource
remove_computeresource Disassociate a resource
info Show a location
</pre>



Expected results:
<pre>
Usage:
hammer location [OPTIONS] SUBCOMMAND [ARG] ...

Parameters:
SUBCOMMAND subcommand
[ARG] ... subcommand arguments

Subcommands:
remove_medium Disassociate a medium
remove_configtemplate Disassociate a configuration template
remove_environment Disassociate an environment
remove_smartproxy Disassociate a smart proxy
add_computeresource Associate a compute resource
list List all locations
[...]
</pre>

...and so on. Likewise for the "Associate a resource" lines.

(https://bugzilla.redhat.com/show_bug.cgi?id=1023164)