Fix Rubocop lints in PropertySortOrder
Fix Rubocop lints in PropertySortOrder

Extract some helper functions from the complex `compare_properties`
method.

Also fix the multi-line method chain lint.

Change-Id: I0b01db044e362a39063b052eb9cb49e19467ef13
Reviewed-on: http://gerrit.causes.com/36716
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

artemartemov/scss-lint-hdm