Bug 1198464

After chatting with jortel a pulp node needs to be activated using this method:

https://github.com/Katello/katello/blob/106bb48226f970a58b4329c6db3cd398477c49f1/app/models/katello/glue/pulp/consumer.rb#L202

when a capsule registers with the pulp_node feature.

from irc:


```
   jortel | stbenjam: looking at your node sync issue, you capsule does not seem to be   
          | activated as a node (in the pulp db)                                         
jsherrill | jortel: when you say 'activated' what do you mean exactly?                   
jsherrill | which api call?                                                              
   jortel | jsherrill: when you create the consumer, you need to add a special top-secret
          | note that indicates it's a node and what it's strategy is                    
   jortel | jsherrill: or, in a consumer update                                          
jsherrill | jortel: is this new?                                                         
jsherrill | (my memory is a little fuzzy)                                                
jsherrill | and i'm trying to find where we might have ever done that                    
jsherrill | i dont' see anything                                                         
jsherrill | we were just registering the consumer and adding environments to sync        
jsherrill | as far as i can tell                                                         
jsherrill | errr, adding repos                   
jsherrill | jortel: doesn't look like, it is possible pulp 2.4 didn't care? 
jortel    | jsherrill: yes, it's possible.  iirc, we fixed a bug whereby that strategy
         | was not being passed to the agent.                                        
```

my guess is that we used to call this method when pulp nodes were first implemented but that got lost along the way.