[COOK-3854] '/bin/chown' replaced by 'chown'

Signed-off-by: Sean OMeara <someara@opscode.com>
fixing up style, updating test harness
Version bump to v0.4.2
Version bump to v0.4.3
Attributes defined by user should not be overrided by ark defaults

This patch preserves path and release_file specified by user. Previous implementation uses ARK default values each time, it does not matter if user specifies his own attributes or not.
Revert "Attributes defined by user should not be overrided by ark defaults"

This reverts commit 3e26d2ffbc217f9da81dfb07856346c9e654fc62.
COOK-3786: Unable to install multiple versions of application using Ark cookbook to directories without duplicated version
All version are now downloaded to separate files (as archive filename now contains version number)