JCLOUDS-1634: Add AzureBlob COLD access tier

References gaul/s3proxy#625.

providers/azureblob/src/main/java/org/jclouds/azureblob/domain/AccessTier.java

diff --git a/providers/azureblob/src/main/java/org/jclouds/azureblob/domain/AccessTier.java b/providers/azureblob/src/main/java/org/jclouds/azureblob/domain/AccessTier.java
index 3c99ef6..ee8cea8 100644
--- a/providers/azureblob/src/main/java/org/jclouds/azureblob/domain/AccessTier.java
+++ b/providers/azureblob/src/main/java/org/jclouds/azureblob/domain/AccessTier.java
@@ -25,6 +25,7 @@
 public enum AccessTier {
    HOT(Tier.STANDARD),
    COOL(Tier.INFREQUENT),
+   COLD(Tier.INFREQUENT),
    ARCHIVE(Tier.ARCHIVE);
 
    private final Tier tier;