New resources added in the VNFSnapshotPackageManagement-API

SOL003/VNFSnapshotPackageManagement-API/ApiVersion.robot

...tPackageManagement-API/IndividualVNFSnapshotPackage.robot

...Management-API/IndividualVNFSnapshotPackageArtifact.robot

...shotPackageManagement-API/VNFSnapshotPackageContent.robot

...NFSnapshotPackageManagement-API/VNFSnapshotPackages.robot

...Management-API/VnfSnapshotPackageManagementKeywords.robot

...NFSnapshotPackageManagement-API/environment/variables.txt

...kageManagement-API/schemas/VnfSnapshotPkgInfo.schema.json

...ageManagement-API/schemas/VnfSnapshotPkgInfos.schema.json