Describe enabled processes in the consul.json URL

The idea to show the status of the existing features was done in commit
7339a98b74. Back then, we didn't have the separate `process.` prefix,
and so processes were enabled/disabled using settings like
`feature.debates` instead of `process.debates`.

IMHO making the information about the enabled features public could
potentially be a bit risky since it gives too much information about the
current status of the application.

Showing which processes are enabled, on the other hand, is pretty
harmless, and it's the reason why this feature was added in the first
place.

app/controllers/installation_controller.rb

@@ -14,6 +14,6 @@ class InstallationController < ApplicationController
     end
 
     def settings_feature_flags
-      Setting.where("key LIKE 'feature.%'").each_with_object({}) { |x, n| n[x.key.remove("feature.")] = x.value }
+      Setting.where("key LIKE 'process.%'").each_with_object({}) { |x, n| n[x.key.remove("process.")] = x.value }
     end
 end

spec/controllers/installation_controller_spec.rb

@@ -2,19 +2,19 @@ require "rails_helper"
 
 describe InstallationController, type: :request do
   describe "consul.json" do
-    let(:test_feature_settings) do
+    let(:test_process_settings) do
       {
-        "disabled_feature" => nil,
-        "enabled_feature" => "t"
+        "disabled_process" => nil,
+        "enabled_process" => "t"
       }
     end
 
-    let(:seeds_feature_settings) { Setting.where("key LIKE 'feature.%'") }
+    let(:seeds_process_settings) { Setting.where("key LIKE 'process.%'") }
 
     before do
-      seeds_feature_settings.destroy_all
-      test_feature_settings.each do |feature_name, feature_value|
-        Setting["feature.#{feature_name}"] = feature_value
+      seeds_process_settings.destroy_all
+      test_process_settings.each do |feature_name, feature_value|
+        Setting["process.#{feature_name}"] = feature_value
       end
     end
 
@@ -23,7 +23,7 @@ describe InstallationController, type: :request do
 
       expect(response).to have_http_status(:ok)
       expect(JSON.parse(response.body)["release"]).not_to be_empty
-      expect(JSON.parse(response.body)["features"]).to eq(test_feature_settings)
+      expect(JSON.parse(response.body)["features"]).to eq(test_process_settings)
     end
   end
 end