By Luc Olinga The CEO of the electric vehicle maker wants to appease worried markets after one of his worrying messages about Tesla. Elon Musk took out his firefighter costume. Tesla (TSLA) – Get Tesla Inc Report CEO tries to put out the fire he himself started about the manufacturer of high-end electric vehicles. The billionaire entrepreneur sent an email on June 3 to Tesla employees in which he told them about cost-cutting measures in the face of the economic slowdown and fears of recession. In the memo, seen by Reuters, the chief executive officer announced that the vehicle manufacturer pla…