lenienttaTestimony Ends Jones TrialGIVibTestimony in the lengthy d- Rvorce trial of Janet and Pres- si ton Jones ended yesterday in flt; Marin Superior Court and Judge | J Samuel W. Gardner gave attorneys 15 davs in which to submitslt;litheir fir it briefs.Actual decision will not be handed down, however, until further briefs are received, he said.Mrs. Jones. 42. of 16 Marina Way, San Rafael, is seeking il-015 a month to support herself J end the couple s 10-year-old son.She and her millionaire San Leandro husband are suing each other on grounds of mental j ( U'i'v. The trial began last TDec. i ■E