MetLife Stadium has had its end zones painted with the words “PAUL McCARTNEY,” in anticipation of his June show there. Paul McCartney won’t perform at MetLife Stadium in East Rutherford until June 16, but you can get a souvenir now. The stadium has painted its two end zones with giant letters reading “PAUL McCARTNEY: GOT BACK.” Also, “GOT BACK: JUNE 16” can be seen on the 50-year line, and “#PAULMcCARTNEYGOTBACK” is written on the two sidelines. Fans can take photos from the field or the seats tonight (Wednesday) from 5:30 to 7:30 and Thursday from noon to 2 p.m. Free parking will be available…