DuplicateKeyException and DuplicateNameException should be checked exceptions.

[heshamMassoud]

Description

DuplicateKeyException and DuplicateNameException should be checked exceptions. Since they don't represent an error in the code but an exception of invalid input data.

[ahmetoz]

According to the code, those exceptions are already a checked exception, but handled as below, which looks ok as a callback.

commercetools-sync-java/src/main/java/com/commercetools/sync/types/utils/TypeUpdateActionUtils.java

Lines 96 to 100 in 385aa40

	syncOptions.applyErrorCallback(
	new SyncException(format("Failed to build update actions for the field definitions "
	+ "of the type with the key '%s'. Reason: %s", newType.getKey(), exception),
	exception), oldType, newType, null);
	return emptyList();