SPRINGFIELD — Cash-strapped Illinois needs to provide in-home nursing care to more than 1,200 children with disabilities and severe medical conditions, a federal judge ordered, responding to a lawsuit alleging the state has failed to fulfill its Medicaid obligations.“This is a systemic problem,” said Robert H. Farley Jr., one of the attorneys suing the state.The ruling from U.S. District Judge Charles P. Kocoras Wednesday does not resolve the lawsuit, which could play out over several months or longer, but his preliminary …