The San Diego City Council, also operating as the Housing Authority, Tuesday renewed operating and oversight agreements for the city’s three temporary tent shelters for the homeless over the objections of Councilman David Alvarez, who called the shelters a “complete failure.” “It’s been a tremendous, tremendous waste of money,” said Alvarez, who cast the lone dissenting vote against renewal. “At the path we’re going, we’re going to continue spending millions and millions of dollars to not get people housed.”