Using correct log property keys

Author: mathewc

src/WebJobs.Script.WebHost/Controllers/AdminController.cs

@@ -166,8 +166,8 @@ public IHttpActionResult Log(IEnumerable<HostLogEntry> logEntries)
                     var logLevel = Utility.ToLogLevel(traceEvent.Level);
                     var logData = new Dictionary<string, object>
                     {
-                        ["Source"] = logEntry.Source,
-                        ["FunctionName"] = logEntry.FunctionName
+                        [ScriptConstants.TracePropertySourceKey] = logEntry.Source,
+                        [ScriptConstants.TracePropertyFunctionNameKey] = logEntry.FunctionName
                     };
                     _logger.Log(logLevel, 0, logData, null, (s, e) => logEntry.Message);
                 }

src/WebJobs.Script/Diagnostics/FileTraceWriter.cs

@@ -254,6 +254,7 @@ private void OnFlushLogs(object sender, ElapsedEventArgs e)
         /// </summary>
         internal void SetLogFile()
         {
+            _logDirectory.Refresh();
             if (!_logDirectory.Exists)
             {
                 _logDirectory.Create();

src/WebJobs.Script/ScriptConstants.cs

@@ -20,6 +20,7 @@ public static class ScriptConstants
 
         public const string TracePropertyPrimaryHostKey = "MS_PrimaryHost";
         public const string TracePropertyFunctionNameKey = "MS_FunctionName";
+        public const string TracePropertySourceKey = "MS_Source";
         public const string TracePropertyEventNameKey = "MS_EventName";
         public const string TracePropertyEventDetailsKey = "MS_EventDetails";
         public const string TracePropertyIsUserTraceKey = "MS_IsUserTrace";