Tesla Motors' SolarCity deal gets a boost from ISS blessing

(Reuters) - Institutional Shareholder Services (ISS) gave a boost to Tesla Motors' plan to buy solar panel installer SolarCity for more than $2 billion by recommending that shareholders of both companies vote for the deal, the advisory firm said on Friday. "The transaction is a necessary step towards TSLA’s goal of being an integrated sustainable energy company," said ISS, an influential proxy advisory firm that recommends votes for contested situations and deals to institutional sharehold