SACRAMENTO, Calif., May 17 (Reuters) - Gov. Arnold Schwarzenegger's new budget plan would balance California's books in the coming fiscal year but some provisions would cause shortfalls to return, with annual deficits above $6.5 billion well into the future, a state fiscal analyst said on Monday. California's budget shortfall could swell to as much as $8 billion in a few years if Schwarzenegger's revised budget plan for the coming fiscal year is passed, Legislative Analyst Elizabeth Hill told reporters. California's longer-term budget outlook has worsened under the new plan compared with Schwarzenegger's initial budget proposal in January, warned Hill, whose...