Remove not supported operations on inventory api.
Merge branch 'master' into inventory

Conflicts:
	CHANGES.md
Refactoring: move UP requestFactory to ProjectScopedAPI
Refactoring: move up createCommandRequest to ProjectScopedAPI
Add method to add InventoryEntry by SKU.
Extract method to simplify querying
Get inventory entry by sku without supply channels
Refactor tests with matcher for properties.
Add io.sphere.internal.request.FetchRequestBasedOnQuery.asFetchRequest.
Add JSON serializer for DateTime.
Add inventory API scenario: Add an inventory entry with restockableInDays and expectedDelivery
Changes for inventory API will be in version 0.50.0.
Merge branch 'master' into inventory

Conflicts:
	java-client/src/it/scala/IntegrationTest.scala
	java-client/src/main/java/io/sphere/internal/OrderServiceImpl.java
Check for duplicate SKU.
Implement Scenario Add stock to inventory entry
Implement Scenario: Remove stock from inventory entry
Implement Scenario: Set restockableInDays
Implement Scenario: Set expectedDelivery
Merge branch 'master' into inventory
Merge branch 'master' into inventory

Conflicts:
	CHANGES.md