Update price calculation code in product-service modules and update with price delta calculation

• Type: Sub-Task
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Digital Merchandise Management → Price Lists, Digital Merchandise Management → Products
• Labels: None
• Git Pull Request: https://github.com/igorbeslic/liferay-portal-ee/pull/138

Latest work was calculation that does minimal product bundle price.

Goal 1:
for given product bundle's cProductId or cpDefinitionId algorithm should return minimal price that user can get when price is composed from option values with minimal price.

Example:
Bundle: Desktop PC - price 200$
Option Keyboard: k1 - 20$, k2 - 30$, k3 - 40$
Option Mouse: m1 - 10$, m2 - 40$, m3 - 100$

Minimal price: 200$ + price(k1) + price(m1) = 230$

This should be applicable to all Required OR SKU Contributor Options.

Goal 2:
for given product bundle configuration designated by specific cpInstanceId and its cpDefinnitionOption configuration provide utility that can tell if given cpDefinitionOptionValue's price (either it is static or dynamic) - increases or decreases given product bundle instance price
(please be aware that cpInstanceOptionValueRel may help here but be aware that some methods filter out NON-SKU Contributor option values)