Fix Geo geo:set_primary_node task not working with HTTPS

The Rake task to set the current node as primary in Geo did not account for HTTPS.

lib/tasks/geo.rake

@@ -100,7 +100,8 @@ namespace :geo do
   end
 
   def set_primary_geo_node(public_key)
-    params = { host: Gitlab.config.gitlab.host,
+    params = { schema: Gitlab.config.gitlab.protocol,
+               host: Gitlab.config.gitlab.host,
                port: Gitlab.config.gitlab.port,
                relative_url_root: Gitlab.config.gitlab.relative_url_root,
                primary: true,

spec/tasks/geo_rake_spec.rb

@@ -10,6 +10,7 @@ describe 'geo rake tasks' do
 
     before do
       expect(Gitlab::Geo).to receive(:license_allows?).and_return(true)
+      stub_config_setting(protocol: 'https')
     end
 
     it 'creates a GeoNode' do
@@ -25,6 +26,7 @@ describe 'geo rake tasks' do
 
         expect(GeoNode.count).to eq(1)
         node = GeoNode.first
+        expect(node.schema).to eq('https')
         expect(node.primary).to be_truthy
         expect(node.geo_node_key.key).to eq(ssh_key)
       ensure