Add experimental fetcher for Azure Key Vault

Usage in a recipe looks like this:

   value = secret(name: "test1", version: "v1",
                  service: :azure_key_vault,
                  config: { vault:  "myvault" } )

Signed-off-by: Marc A. Paradise <marc.paradise@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/chef/exceptions.rb b/lib/chef/exceptions.rb
index 6a90b0cc52..dcb7146510 100644
--- a/lib/chef/exceptions.rb
+++ b/lib/chef/exceptions.rb
@@ -295,7 +295,7 @@ class Chef
       class ConfigurationInvalid < RuntimeError; end
       class FetchFailed < RuntimeError; end
       class MissingSecretName < RuntimeError; end
-
+      class InvalidSecretName < RuntimeError; end
       class InvalidFetcherService < RuntimeError
         def initialize(given, fetcher_service_names)
           super("#{given} is not a supported secrets service.  Supported services are: :#{fetcher_service_names.join(" :")}")
@@ -308,6 +308,7 @@ class Chef
         end
       end
 
+      class MissingVaultName < RuntimeError; end
     end
 
     # Exception class for collecting multiple failures. Used when running