Merge pull request #746 from inspec/feature/CHEF-2414-warn-azure-deprecation

CHEF-2414 Deprecate azure connections from train

Author: clintoncwolfe

lib/train/transports/azure.rb

@@ -31,6 +31,7 @@ class Connection < BaseConnection
       DEFAULT_FILE = ::File.join(Dir.home, ".azure", "credentials")
 
       def initialize(options)
+        warn("Azure Connection with Train will be deprecated from Train 4")
         @apis = {}
 
         # Override for any cli options