Enable Debugging of chutney-launched tor nodes

Set DisableDebuggerAttachment to 0, because if you're running a
test network, you might actually want to use a debugger on tor.

torrc_templates/common.i

@@ -9,5 +9,5 @@ Log notice file ${dir}/notice.log
 Log info file ${dir}/info.log
 ProtocolWarnings 1
 SafeLogging 0
+DisableDebuggerAttachment 0
 ${authorities}
-