Adds a constant id for the member distributed cache object,

adds extension method to DistrubutedCache to refresh the member cache,
Changes all distrubuted cache calls for members to use extension method.

src/Umbraco.Web/Cache/DistributedCache.cs

@@ -53,6 +53,16 @@ namespace Umbraco.Web.Cache
         {
             dc.Remove(new Guid(DistributedCache.PageCacheRefresherId), pageId);
         }
+
+        /// <summary>
+        /// Refreshes the cache amongst servers for a member
+        /// </summary>
+        /// <param name="dc"></param>
+        /// <param name="memberId"></param>
+        public static void RefreshMemberCache(this DistributedCache dc, int memberId)
+        {
+            dc.Refresh(new Guid(DistributedCache.MemberCacheRefresherId), memberId);
+        }
     }
 
     /// <summary>
@@ -75,6 +85,7 @@ namespace Umbraco.Web.Cache
 
         public const string TemplateRefresherId = "DD12B6A0-14B9-46e8-8800-C154F74047C8";
         public const string PageCacheRefresherId = "27AB3022-3DFA-47b6-9119-5945BC88FD66";
+        public const string MemberCacheRefresherId = "E285DF34-ACDC-4226-AE32-C0CB5CF388DA";
         
         #endregion
 

src/Umbraco.Web/Cache/MemberLibraryRefreshers.cs

@@ -9,7 +9,7 @@ namespace Umbraco.Web.Cache
 
         public Guid UniqueIdentifier
         {
-            get { return new Guid("E285DF34-ACDC-4226-AE32-C0CB5CF388DA"); }
+            get { return new Guid(DistributedCache.MemberCacheRefresherId); }
         }
 
         public string Name

src/Umbraco.Web/CacheHelperExtensions.cs

@@ -113,9 +113,7 @@ namespace Umbraco.Web
 
             if (allServers && UmbracoSettings.UseDistributedCalls)
             {
-                DistributedCache.Instance.Refresh(
-                    new Guid("E285DF34-ACDC-4226-AE32-C0CB5CF388DA"),
-                    memberId);
+                DistributedCache.Instance.RefreshMemberCache(memberId);
             }
             else
             {