Description of problem:

Calling
        @api.resource(:activation_keys).call(
          :add_host_collections,
          {
            :id => ak_id,
            :host_collection_ids => hc_ids
          })
does not associate host_collections with the activation key

Version-Release number of selected component (if applicable):
Satellite-6.0.3-RHEL-6-20140521.0-Satellite-x86_64

How reproducible:
always

Steps to Reproduce:
# bundle exec irb
irb> require 'apipie-bindings'
irb> api = ApipieBindings::API.new({:uri => 'http://localhost:3000/', :username => 'admin', :password => 'changeme', :api_version=> '2', :aggressive_cache_checking => true})
irb> api.resource(:activation_keys).call(
          :add_host_collections,
          {
            :id => ak_id,
            :host_collection_ids => hc_ids
          })

Actual results:
* API call runs without issues, but does not associate host collections with the activation key
* according to config/routes/api/v2.rb it looks like :remove_host_collections is called instead

Expected results:
associate host collections with the activation key

Additional info:
* <sat6>/apidoc/v2/activation_keys/add_host_collections
does not have complete apidoc
* Ivan's patch:

diff --git a/config/routes/api/v2.rb b/config/routes/api/v2.rb
index ad7cb9a..3456d10 100644
--- a/config/routes/api/v2.rb
+++ b/config/routes/api/v2.rb
 -27,8 +27,8 @@ Katello::Engine.routes.draw do
         match '/releases' => 'activation_keys#available_releases', :via => :get, :on => :member
         api_resources :host_collections, :only => [:index]
         member do
-          match '/host_collections' => 'activation_keys#add_host_collections', :via => :post
-          match '/host_collections' => 'activation_keys#remove_host_collections', :via => :put
+          match '/host_collections' => 'activation_keys#add_host_collections', :via => :put
+          match '/host_collections' => 'activation_keys#remove_host_collections', :via => :delete
           match '/host_collections/available' => 'activation_keys#available_host_collections', :via => :get
         end
         api_resources :products, :only => [:index]