Revert SSL verification config change

app/models/clusters/platforms/kubernetes.rb

@@ -143,7 +143,7 @@ module Clusters
       end
 
       def kubeclient_ssl_options
-        opts = { verify_ssl: OpenSSL::SSL::VERIFY_NONE }
+        opts = { verify_ssl: OpenSSL::SSL::VERIFY_PEER }
 
         if ca_pem.present?
           opts[:cert_store] = OpenSSL::X509::Store.new

app/models/concerns/prometheus_adapter.rb

@@ -26,7 +26,7 @@ module PrometheusAdapter
 
       query_class = Gitlab::Prometheus::Queries.const_get("#{query_name.to_s.classify}Query")
 
-      args.map! { |arg| arg.id }
+      args.map!(&:id) { |arg| arg.id }
 
       with_reactive_cache(query_class.name, *args, &query_class.method(:transform_reactive_result))
     end