Merge branch 'hotfix/2.2.5'
removed leftin print_r from test suite
test for relativeDiscount_amount (calculated on all order rows only)
updated documentation on relativeDiscount()
added test for fixedDiscount expressed as exvat + vat
added tests for FixedDiscount behaviour
updated tests and documentation for FixedDiscount, WebPayItem::fixedDiscount()
Merge branch 'documented_relativeDiscount_and_fixedDiscount_behaviour' into develop