Add caching of provider access token

Because we need this data in award complaints

@@ -381,6 +381,7 @@ Library  openprocurement_client_helper.py
   [Arguments]  ${username}  ${tender_uaid}  ${bid}
   ${tender}=  openprocurement_client.Пошук тендера по ідентифікатору  ${username}  ${tender_uaid}
   ${reply}=  Call Method  ${USERS.users['${username}'].client}  create_bid  ${tender}  ${bid}
+  Set To Dictionary  ${USERS.users['${username}']}  access_token=${reply['access']['token']}
   Set To Dictionary   ${USERS.users['${username}'].bidresponses['bid'].data}  id=${reply['data']['id']}
   Log  ${reply}
   [return]  ${reply}