Description of problem:

The Satellite WebUI -> Content -> Activation Keys page asks user to register hosts with Satellite using deprecated method.

subscription-manager register --org="org_name" --activationkey="activation_key_name"

Version-Release number of selected component (if applicable): Satellite 6.15.0

How reproducible: Always

Steps to Reproduce:
1. Create a activation key in Satellite.
2. Navigate to Satellite WebUI -> Content -> Activation Keys -> Click on the name of created activation key. Go to 'Details' tab.

Actual results: The page asks user to register machine with Satellite using old deprecated method.

~~~~~
This activation key may be used during system registration. For example:

subscription-manager register --org="RedHat" --activationkey="ak_1"
~~~~~

Expected results: The page should ask user to register machine with Satellite using Global Registration Template way and not using deprecated way.

Additional info: Navigate to Satellite WebUI -> Configure -> Host groups -> Create Host Groups -> Go to 'Activation keys' tab. It says below.

~~~
Subscriptions information based on selected activation keys:

Activation keys and subscriptions can be managed here

http://vm205-193.uatlab.pnq2.redhat.com/pub/katello-ca-consumer-latest.noarch.rpm
~~~
The katello-ca-consumer method of registration has been deprecated and should be removed from Host Groups page also.