applied comments on SOL003 from SOL WG review

...SOL003/VNFLifecycleManagement/VNFLifecycleManagement.yaml

...agement/definitions/SOL003VNFLifecycleManagement_def.yaml

...ementNotification/VNFLifecycleManagementNotification.yaml

...agementNotification/VNFPackageManagementNotification.yaml

src/definitions/SOL002SOL003VNFLifecycleManagement_def.yaml

src/definitions/SOL002SOL003_def.yaml