slapos_panel: encode json string to use UTF-8

master/bt5/slapos_panel/SkinTemplateItem/portal_skins/slapos_panel/InstanceTree_getMonitorParameterDict.py

+from Products.ERP5Type.Utils import unicode2str
+
 def getCredentialFromUrl(url_string):
   username = password = url = ''
   param_list = url_string.split('#')
@@ -44,7 +46,7 @@ else:
   return {}
 
 return {
-  'username': username,
-  'password': password,
-  'url': url
+  'username': unicode2str(username),
+  'password': unicode2str(password),
+  'url': unicode2str(url)
   }

master/bt5/slapos_panel/SkinTemplateItem/portal_skins/slapos_panel/SoftwareInstance_getConnectionParameterList.py

 from Products.ERP5Type.Document import newTempBase
+from Products.ERP5Type.Utils import unicode2str
+
 import json
 
 return_list = []
@@ -21,9 +23,9 @@ if relative_url == None:
 
 for k in sorted(connection_dict):
   if raw:
-    d = {"connection_key": k, "connection_value": connection_dict[k]}
+    d = {"connection_key": k, "connection_value": unicode2str(connection_dict[k])}
   else:
     d = newTempBase(portal, relative_url)
-    d.edit(connection_key=k, connection_value=connection_dict[k])
+    d.edit(connection_key=k, connection_value=unicode2str(connection_dict[k]))
   return_list.append(d)
 return return_list