Improved recipe so that it uses default Opsworks definitions

[fred]

Here is a pull request with my changes, apply if you think it will be useful to you.
Any comments or objections let me know.

[redterror]

+1, the restart fix here is important.

[fbbergamo]

+1

[rhzs]

@fred the restart sidekiq does not work
I got error on opswork,

 
================================================================================
Error executing action `run` on resource 'execute[restart Rails app myapp]'
================================================================================
 
 
Mixlib::ShellOut::ShellCommandFailed
------------------------------------
Expected process to exit with [0], but received '1'
---- Begin output of sudo monit restart -g sidekiq_myapp_group ----
STDOUT: 
STDERR: monit: action failed -- Other action already in progress -- please try again later
---- End output of sudo monit restart -g sidekiq_myapp_group ----
Ran sudo monit restart -g sidekiq_myapp_group returned 1
 
 
Resource Declaration:
---------------------
# In /var/lib/aws/opsworks/cache.stage2/cookbooks/opsworks_sidekiq/recipes/deploy.rb
 
34:   execute "restart Rails app #{application}" do
35:     command node[:sidekiq][application][:restart_command]
36:   end
37: 
 
 
 
Compiled Resource:
------------------
# Declared in /var/lib/aws/opsworks/cache.stage2/cookbooks/opsworks_sidekiq/recipes/deploy.rb:34:in `block in from_file'
 
execute("restart Rails app myapp") do
action "run"
retries 0
retry_delay 2
command "sudo monit restart -g sidekiq_myapp_group"
backup 5
returns 0
cookbook_name "opsworks_sidekiq"
recipe_name "deploy"
end