Evolved5g

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* Bug fix on CLI method register_and_onboard_to_capif: Now accepts a second parameter --environment that takes values "production" or "development".
If this parameter is set to production then validation tests are running in the background, just after the registration and onboarding of the network app finishes.


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* The CLI command run-verification-tests now required three inputs (capif registration file, certificates folder and verification file) to launch NEF and TSN verification pipelines.
* CAPIFProviderConnector has a new method offboard_and_deregister_netapp() that allows a network app to be offboarded and deregistered from CAPIF.
* The SDK classes LocationSubscriber,ConnectionMonitor,QosAwareness don't accept the parameter 'nef_bearer_access_token' any more.
* The CLI method register_and_onboard_to_capif now accepts a second parameter --environment that takes values "production" or "development".
If this parameter is set to production then validation tests are running in the background, just after the registration and onboarding of the network app finishes.

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* Bug fix on CAPIFProviderConnector. When storing the capif_cert_server.pem the port was hardcoded.
* Improvement on verification pipelines. Required user and password.
* TSN verification pipeline added.
* Validation pipeline included.

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* Bug fix on ServiceDiscoverer: When creating the security context we now pass OAUTH as prefSecurityMethod

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* New SDK Class CAPIFLogger, that allows a provider (like NEF Emulator) to save Log information, for example capture incoming requests and responses
* New SDK Class CAPIFAuditor, that allows a provider (like NEF Emulator) to query the Log, for example filter all the Log information for a given Network APP
* Added examples of usage for CAPIFLogger and CAPIFAuditor class in examples/nef_logger_and_audit_example.py
* At CAPIFProviderConnector class when using the publish_services() method, a copy of the published to CAPIF api is saved to the local certificates folder. This is useful if you want to retrieve the relevant CAPIF ids for this service like aef_id or api_id.

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* Update TSN Manager class, apply security improvements. Now each request to the TSN API uses JWT Bearer authentication. Access tokens are retrieved via CAPIF.
* Bug fix on minimum python version. Change it from 3.6 to 3.7. Installing the SDK in older ubuntu distribution raises an error at runtime requiring higher python version coming from Cookiecutter.

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