updated endpoints descriptions

src/SOL003/VNFFaultManagement/VNFFaultManagement.yaml

...anagementNotification/VNFFaultManagementNotification.yaml

src/SOL003/VNFIndicator/VNFIndicator.yaml

...03/VNFIndicatorNotification/VNFIndicatorNotification.yaml

...SOL003/VNFLifecycleManagement/VNFLifecycleManagement.yaml

...ementNotification/VNFLifecycleManagementNotification.yaml

...cycleOperationGranting/VNFLifecycleOperationGranting.yaml

src/SOL003/VNFPackageManagement/VNFPackageManagement.yaml

...agementNotification/VNFPackageManagementNotification.yaml

...03/VNFPerformanceManagement/VNFPerformanceManagement.yaml

...entNotification/VNFPerformanceManagementNotification.yaml

...apshotPackageManagement/VNFSnapshotPackageManagement.yaml

...ation/VirtualisedResourcesQuotaAvailableNotification.yaml