Set descriptive bc uid only if provided by server.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24199 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Wizard/Tool/WizardTool.py

@@ -767,7 +767,8 @@ class WizardTool(BaseTool):
     server_url = self.getServerUrl() + self.getServerRoot()
     server_response = self._callRemoteMethod('getBT5FilesForBusinessConfiguration', server_url)
     ## save erp5_uid which will make it possible to distingush different business conf for client
-    current_bc_index = server_response['server_buffer']['current_bc_index']
+    current_bc_index = server_response['server_buffer'].get('current_bc_index', None)
+    if current_bc_index is not None:
       self._setServerInfo(current_bc_index = current_bc_index)
     self.installBT5FilesFromServer(server_response, True)
     server_response = self._callRemoteMethod('finalizeInstallation', server_url)