Merge remote-tracking branch 'origin/Validations_dev'

Conflicts:
SPIN_API/.classpath
SPIN_API/src/usdl/servicemodel/CloudProvider.java
SPIN_API/src/usdl/servicemodel/LinkedUSDLModel.java
SPIN_API/src/usdl/servicemodel/Offering.java
SPIN_API/src/usdl/servicemodel/PriceComponent.java
SPIN_API/src/usdl/servicemodel/PriceFunction.java
SPIN_API/src/usdl/servicemodel/PricePlan.java
SPIN_API/src/usdl/servicemodel/PriceSpec.java
SPIN_API/src/usdl/servicemodel/QualitativeValue.java
SPIN_API/src/usdl/servicemodel/QuantitativeValue.java
SPIN_API/src/usdl/servicemodel/Service.java