Refactoring. Removed extra underscore

Author: AndreiMaz

src/Presentation/Nop.Web/Factories/PollModelFactory.cs

@@ -68,7 +68,7 @@ public virtual PollModel PreparePollModelBySystemName(string systemKeyword)
             if (String.IsNullOrWhiteSpace(systemKeyword))
                 return null;
 
-            var cacheKey = string.Format(ModelCacheEventConsumer.POLL_BY_SYSTEMNAME__MODEL_KEY, systemKeyword, _workContext.WorkingLanguage.Id);
+            var cacheKey = string.Format(ModelCacheEventConsumer.POLL_BY_SYSTEMNAME_MODEL_KEY, systemKeyword, _workContext.WorkingLanguage.Id);
             var cachedModel = _cacheManager.Get(cacheKey, () =>
             {
                 Poll poll = _pollService.GetPolls(languageId: _workContext.WorkingLanguage.Id, systemKeyword: systemKeyword).FirstOrDefault();

src/Presentation/Nop.Web/Infrastructure/Cache/ModelCacheEventConsumer.cs

@@ -628,7 +628,7 @@ public ModelCacheEventConsumer(CatalogSettings catalogSettings)
         /// {0} : poll system name
         /// {1} : language ID
         /// </remarks>
-        public const string POLL_BY_SYSTEMNAME__MODEL_KEY = "Nop.pres.poll.systemname-{0}-{1}";
+        public const string POLL_BY_SYSTEMNAME_MODEL_KEY = "Nop.pres.poll.systemname-{0}-{1}";
         public const string POLLS_PATTERN_KEY = "Nop.pres.poll";
 
         /// <summary>