AdsSymbolicServer sample doesn't provide symbolic information

[drvic10k]

Steps to reproduce:

1. host AmsTcpIpRouter in a standalone service
2. run the AdsSymbolicServerSample
3. use the powershell for testing as described in the readme.md
4. call get-tcDataType -> empty result, same for Get-TcSymbol –recurse
5. call Read-TcValue -path Main.string1

Read-TcValue : Reading Symbols from 'Session ID:12 (127.0.0.1.1.1:25100)' failed (Symbol 'Main.string1' not found.
Target '127.0.0.1.1.1:25100 doesn't provide symbolic information!)!
At line:1 char:12
+ $session | Read-TcValue -path Main.string1
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidResult: (Session ID:12 (127.0.0.1.1.1:25100):AdsSession) [Read-TcValue], ErrorExc
   eption
    + FullyQualifiedErrorId : DestinationNotReachable,TwinCAT.Management.Automation.ReadValueCmdlet

Read-TcValue : Symbol 'Main.string1' not found. Target '127.0.0.1.1.1:25100 doesn't provide symbolic information!
At line:1 char:12
+ $session | Read-TcValue -path Main.string1
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Read-TcValue], ErrorException
    + FullyQualifiedErrorId : TwinCAT.Core.ErrorException,TwinCAT.Management.Automation.ReadValueCmdlet

[RalfHeitmann]

Should work now with the latest commit.