Since Gov. Bruce Rauner emerged onto the Illinois political scene four years ago, redistricting reform has been a staple of his agenda.Not this year.The Republican governor this week outlined several priorities for the bulk of the General Assembly’s spring session, including a full budget and property tax changes.But he downplayed his quest to take map-making powers from the legislature, a topic he frequently pushes as part of his battle with longtime Democratic House Speaker Michael J. Madigan.Rauner said at a news …