grant create container permission (#269)

Author: zhou9584

common/src/main/java/com/microsoft/hydralab/common/entity/common/SASData.java

@@ -25,7 +25,7 @@ public enum SASPermission {
         /**
          * Define permission
          */
-        Write("b", "o", "war"),
+        Write("b", "co", "war"),
         Read("b", "o", "r");
 
         public final String serviceStr, resourceStr, permissionStr;