Fix lut files that do not exist as never being considered outdated for the purpose of importing

The timestamp returned by %RoutineMgr.TS() is always the current time for a lut file that does not exist or has yet to be imported, resulting in such lut files as never being considered as outdated when performing an import.

Check that lut files exist before using the returned timestamp, allowing them to be imported.

Author: raymond-rebbeck

cls/SourceControl/Git/Utils.cls

@@ -1308,7 +1308,8 @@ ClassMethod RoutineTSH(InternalName As %String) As %String
 
     if tsh = "" {
         #dim ts as %String = ##class(%RoutineMgr).TS(InternalName)
-        if ts '= "" {
+        // lut files that do not exist always return the current time as a timestamp, check that they exist before using it
+        if (ts '= "") && ((type '= "lut") || ((type = "lut") && ##class(%RoutineMgr).Exists(InternalName))) {
             // prj files have milliseconds in timestamp, so we crop them
             set tsh = $piece($zdatetimeh(ts, 3),".",1)
         } else {