KUALA LUMPUR (AFX-ASIA) – Rating Agency Malaysia Bhd said it is maintaining its P1 rating on Petronas Gas Bhd’s RM500million Murabahah notes issuance facility, despite the company currently being involved in a legal dispute. (US$1=RM3.8) Petronas Gas was served a writ of summons on Feb 13 by Tetracon Engineering Sdn Bhd, one of its contractors…