Fix bad threading code

lib/capify-ec2.rb

@@ -312,8 +312,8 @@ def deregister_instance_from_named_elbs_by_dns(server_dns, load_balancer_names)
     threads = []
 
     for load_balancer_name in load_balancer_names do
-      threads << Thread.new({
-        load_balancer = get_load_balancer_by_name(load_balancer_name)
+      threads << Thread.new(load_balancer_name) do |lb|
+        load_balancer = get_load_balancer_by_name(lb)
 
         if load_balancer
           puts "[Capify-EC2] Removing instance from named ELB '#{load_balancer.id}'..."
@@ -323,7 +323,7 @@ def deregister_instance_from_named_elbs_by_dns(server_dns, load_balancer_names)
 
           lbs << load_balancer
         end
-      })
+      end
     end
 
     for t in threads do

lib/capify-ec2/capistrano.rb

@@ -179,17 +179,17 @@ def capify_ec2
         threads = []
 
         for load_balancer_to_reregister in load_balancers_to_reregister do
-          threads << Thread.new({
-            puts "[Capify-EC2] Starting registration of ELB '#{load_balancer_to_reregister.id}'"
+          threads << Thread.new(load_balancer_to_reregister) do |lb|
+            puts "[Capify-EC2] Starting registration of ELB '#{lb.id}'"
 
-            reregistered = capify_ec2.reregister_instance_with_elb_by_dns(server_dns, load_balancer_to_reregister, 60)
+            reregistered = capify_ec2.reregister_instance_with_elb_by_dns(server_dns, lb, 60)
             if reregistered
-              puts "[Capify-EC2] Instance registration with ELB '#{load_balancer_to_reregister.id}' successful.".green.bold
+              puts "[Capify-EC2] Instance registration with ELB '#{lb.id}' successful.".green.bold
             else
-              puts "[Capify-EC2] Instance registration with ELB '#{load_balancer_to_reregister.id}' failed!".red.bold
+              puts "[Capify-EC2] Instance registration with ELB '#{lb.id}' failed!".red.bold
               raise CapifyEC2RollingDeployError.new("ELB registration timeout exceeded", server_dns)
             end  
-          })
+          end
         end
 
         for t in threads do