SPRINGFIELD — Illinois’ first full budget plan since 2015, complete with tax hikes, is bound to be controversial among political groups and lawmakers leading up to next year’s elections.But advocates in the legal system mostly said this week they are happy the impasse of more than two years over a state spending plan is over.“Like everyone, we’re relieved that there is a budget and we’re not functioning on consent decrees and court orders,” said Lawrence J. Suffredin Jr., a …