Log and cleanup failed builds

[dirgim]

This change handles the logging and cleanup of failed builds:

• Record which resources were created from the template when we run the new-app command
• Clean all the recorded resources related to the template up if the build failed
• Detect if the build failed instantly (while we were waiting for it to be scheduled)
• Save logs of failed builds to log directory in /tmp/contra-env-setup/logs/run-$timestamp/
• If any of the builds failed, output debug message with the specific log directory location

[arilivigni]

LGTM as long as it has been tested