updates on SOL003 and SOL005 high level code

...Notification-API/SOL003-VNFPerformanceManagement-API.json

...manceManagementNotification-API/environment/variables.txt

...gementNotification-API/schemas/ProblemDetails.schema.json

SOL005/NSDManagement-API/NSDManagementKeywords.robot

SOL005/NSDManagement-API/NSDManagementNotification.robot

SOL005/NSDManagement-API/Subscriptions.robot

SOL005/NSDManagement-API/environment/subscriptions.txt

SOL005/NSDManagement-API/environment/variables.txt

SOL005/NSDManagement-API/jsons/subscriptions.json

...manceManagement-API/NSPerformanceManagementKeywords.robot

SOL005/NSPerformanceManagement-API/Subscriptions.robot

SOL005/NSPerformanceManagement-API/environment/variables.txt

...NSPerformanceManagement-API/jsons/CreatePmJobRequest.json

SOL005/NSPerformanceManagement-API/jsons/subscriptions.json