Move initialization of symboltable

The interactive clients all call Main.init, so init the symbol table
in this call as well.

Belonging to [master]:
  - OpenModelica/OMCompiler#2129

Compiler/Main/Main.mo

@@ -776,6 +776,7 @@ algorithm
   args_1 := Flags.new(args);
   System.gettextInit(if Config.getRunningTestsuite() then "C" else Flags.getConfigString(Flags.LOCALE_FLAG));
   setDefaultCC();
+  SymbolTable.reset();
 end init;
 
 public function main
@@ -849,8 +850,6 @@ algorithm
   try
     Settings.getInstallationDirectoryPath();
 
-    SymbolTable.reset();
-
     readSettings(args);
     if Flags.isSet(Flags.INTERACTIVE_TCP) then
       print("The flag -d=interactive is depreciated. Please use --interactive=tcp\n");