BORJA SUAREZ DOZENS of migrants have set up a makeshift camp in Spain's Canary Islands, leaving an official, much larger camp where they said they had received poor food, scant medical attention and did not have enough showers. In the face of soaring levels of migration from Africa, authorities on the Canaries have resorted to housing thousands in converted former military facilities. More than 1,500 have been living in the Las Raices camp, a former barracks near the city of La Laguna on Tenerife for the last two months. "The camp is really bad," said a Senegalese migrant who gave…