Under a veil of secrecy, Los Angeles city officials and homeless services providers are rushing to move as many homeless people as possible from Echo Park Lake this week in advance of an expected sweep to remove more than 100 tents and fence the entire park for repairs. City Councilman Mitch O’Farrell, who has said he planned to close the park, has declined to confirm the timetable, but a source with direct knowledge of the process told The Times that the city plans to clear the encampment Thursday, fence the park and close it for renovations. O’Farrell spokesman Tony Arranaga...