Added unit tests for MSIDMacLegacyCachePersistenceHandler
Added unit tests for MSIDMacLegacyCachePersistenceHandler

AzureAD/microsoft-authentication-library-for-objc,AzureAD/microsoft-authentication-library-for-objc,AzureAD/microsoft-authentication-library-for-objc,AzureAD/microsoft-authentication-library-for-objc,AzureAD/microsoft-authentication-library-for-objc