Description of problem:
If aeolus-image is run when Conductor is down, a backtrace is thrown, rather than a helpful error.


Version-Release number of selected component (if applicable):
rubygem-aeolus-cli-0.1.0-3.20111024205439gitc3aa990.fc15.noarch


How reproducible:
100%


Steps to Reproduce:
1. service aeolus-conductor stop
2. aeolus-image list --images
3. Error!

  
Actual results:
$ aeolus-image build --target mock --template ~/template.tpl 
/usr/lib/ruby/1.8/net/http.rb:560:in `initialize': Connection refused - connect(2) (Errno::ECONNREFUSED)
	from /usr/lib/ruby/1.8/net/http.rb:560:in `open'
	from /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
	from /usr/lib/ruby/1.8/timeout.rb:67:in `timeout'
	from /usr/lib/ruby/1.8/timeout.rb:101:in `timeout'
	from /usr/lib/ruby/1.8/net/http.rb:560:in `connect'
	from /usr/lib/ruby/1.8/net/http.rb:553:in `do_start'
	from /usr/lib/ruby/1.8/net/http.rb:542:in `start'
	from /usr/lib/ruby/1.8/net/http.rb:1035:in `__request__'
	from /usr/lib/ruby/gems/1.8/gems/rest-client-1.6.1/lib/restclient/net_http_ext.rb:17:in `request'
	from /usr/lib/ruby/1.8/net/http.rb:845:in `post'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:112:in `send'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:112:in `request'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.10/lib/active_support/notifications.rb:52:in `instrument'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.10/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.10/lib/active_support/notifications.rb:52:in `instrument'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:109:in `request'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:97:in `post'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:217:in `with_auth'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/connection.rb:97:in `post'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/base.rb:1314:in `create_without_notifications'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/observing.rb:11:in `create'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/base.rb:1117:in `save_without_validation'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/validations.rb:87:in `save_without_notifications'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/observing.rb:11:in `save'
	from /usr/lib/ruby/gems/1.8/gems/activeresource-3.0.10/lib/active_resource/base.rb:1134:in `save!'
	from /usr/lib/ruby/gems/1.8/gems/aeolus-cli-0.1.0/lib/aeolus_cli/command/build_command.rb:37:in `run'
	from /usr/lib/ruby/gems/1.8/gems/aeolus-cli-0.1.0/lib/aeolus_cli/command/config_parser.rb:220:in `build'
	from /usr/lib/ruby/gems/1.8/gems/aeolus-cli-0.1.0/lib/aeolus_cli/command/config_parser.rb:38:in `send'
	from /usr/lib/ruby/gems/1.8/gems/aeolus-cli-0.1.0/lib/aeolus_cli/command/config_parser.rb:38:in `process'
	from /usr/lib/ruby/gems/1.8/gems/aeolus-cli-0.1.0/bin/aeolus-image:20
	from /usr/bin/aeolus-image:19:in `load'
	from /usr/bin/aeolus-image:19


Expected results:
A helpful error along the lines of, "Could not reach Conductor. Please ensure that the aeolus-conductor service is running."