NextEra Energy Inc., which is in the process of buying Hawaiian Electric Co. for $4.3 billion, is open to the idea of developing wind and solar projects on county or state-owned lands that house pumping stations such as those of the Honolulu Board of Water Supply, according to public documents filed this week. The Florida-based energy company said in response to a question from the water board, an intervenor in the major acquisition case before the Hawaii Public Utilities Commission, that it is…