rest: add retcode field to POST /shell/run

provide return code as result to ogserver.

Update virtual mode driver to return dummy value, although this command
is unimplemented, this seems to be broken due to possible TypeError when
accessing result from caller.

src/live/ogOperations.py

@@ -297,7 +297,7 @@ class OgLiveOperations:
 
         self.refresh(ogRest)
 
-        return output.decode('utf-8')
+        return (ogRest.proc.returncode, output.decode('utf-8'))
 
     def session(self, request, ogRest):
         disk = request.getDisk()

src/ogRest.py

@@ -92,7 +92,7 @@ class ogThread():
 			return
 
 		try:
-			shellout = ogRest.operations.shellrun(request, ogRest)
+			(retcode, shellout) = ogRest.operations.shellrun(request, ogRest)
 		except Exception as e:
 			ogRest.send_internal_server_error(client, exc=e)
 			return
@@ -100,6 +100,7 @@ class ogThread():
 		if request.getEcho():
 			json_body = jsonBody()
 			json_body.add_element('out', shellout)
+			json_body.add_element('retcode', retcode)
 			response = restResponse(ogResponses.OK, json_body, seq=client.seq)
 			client.send(response.get())
 		else:

src/virtual/ogOperations.py

@@ -240,7 +240,7 @@ class OgVirtualOperations:
         self.poweroff_host()
 
     def shellrun(self, request, ogRest):
-        return
+        return (0, "")
 
     def session(self, request, ogRest):
         disk = request.getDisk()

src/windows/ogOperations.py

@@ -93,7 +93,7 @@ class OgWindowsOperations:
             if error.stdout:
                 return error.stdout
             return "{Non zero exit code and empty output}"
-        return result.stdout
+        return (result.returncode, result.stdout)
 
     def session(self, request, ogRest):
         raise NotImplementedError