Release 0.5.1

[rayluo]

Each individual PR referenced below has been previously reviewed and accepted. The current PR organizes the release process. The following content will become release notes.

• Enhancement: Add a new parameter in the AuthenticationContext to turn on Personally Identifiable Information (PII) in logs. (AuthenticationContext(...) adds an enable_pii flag #124)
• Enhancement: Acquiring token via WSTrust will also have timeout behavior now. (WSTrustRequest.acquire_token does not have a timeout #121, Add timeout for WSTrust #125)
• Bugfix: Previously ADAL Python had some issue when the Azure AD tenant is federated with an on-prem AD. Now fixed. (Issue with authenticating to Dynamics 365 CRM #80, Return xml as is #120)
• Enhancement: Handle rare multithread racing issue observed when using profiler (acquire_token not thread-safe #123, Fix for thread racing issue in cache.remove() #128)

If you want to have a hands-on test, you can grab this release candidate by:

pip install git+https://github.com/AzureAD/azure-activedirectory-library-for-python.git@release-0.5.1

[navyasric]

Looks good!

[henrik-me]