fix omnibus path
refactors; add helpers for loading configuration and knife;
refactor ssh method; add proxy_ssh method for containers
close ssh only if open; log command output
use newer load_knife method over load_knife_config
beef up command methods; added better general logging and exception logging
refactors; use new methods; use new tag pattern
refactors; use new methods; use new tag pattern; refactored out ssh code blocks for test lab ssh helper methods; add log task for streaming local and remote cucumber chef logs at the same time