Merge branch 'master' of https://forge.etsi.org/gitlab/stf/stf-557/api-tests.git

SOL002/VNFLifecycleManagement-API/HealVNFTask.robot

SOL002/VNFLifecycleManagement-API/environment/variables.txt

...anceManagement-API/VNFPerformanceManagementKeywords.robot

SOL003/VNFPackageManagement-API/IndividualSubscription.robot

SOL003/VNFPackageManagement-API/Subscriptions.robot

...VNFPackageManagement-API/VNFDInIndividualVNFPackage.robot

SOL003/VNFPackageManagement-API/VNFPackageArtifacts.robot

...FPackageManagement-API/VNFPackageManagementKeywords.robot

...kageManagement-API/environment/individualSubscription.txt

...PackageManagement-API/environment/vnfPackageArtifacts.txt