Previously, even if $version were passed to apt::force, aptitude would just
install the default version of the package available. This updates the aptitude
call to use the version string if it exists. If no version is passed, or if it
is false, no version is added to the aptitude call. This also updates the
rspec-puppet tests for the define, to reflect the changes to the exec.
This patch fixes the query used by apt::force to
determine rather or not the package is installed.
Previously, the expression was not specific enough and
could not lead to false positives in cases where a package
name is contained within another package name (puppet could be
incorrectly determined as being installed if puppet-common is
installed)
This commit resolves that by improving the query expression.
