Draft: Prevent to start Open ETP Server when failed to retrieve required tokens/secrets

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [Yes]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

Updates description?

• Close the application when can't load provider, retrieve some token or secret.
• Close the application if there were no any created DB connection.
• Add more logging in the Azure services (for help to understand the issue with Azure tests).
• Add try...catch to Azure provider API, C-functions can't throw exceptions (error with read access violation).
• Fix memory leak in the code that loading Azure provider library (there was used simple delete for array of characters).
• Small code refactoring.