The man suing Powerball winner Edwin Castro has been ruled competent to stand trial in a separate criminal case, RadarOnline.com has learned. Jose Rivera was ordered to undergo a mental health evaluation after he had an outburst in court and fired his public defender. Rivera pleaded not guilty after he was charged with filing a false police report in Pasadena about the alleged theft of the winning lottery ticket. Last month, a judge suspended Rivera’s criminal case and ordered him to undergo a mental health evaluation. After sitting for an hours-long psychiatric evaluation, the physician ruled…