test/formula_installer_spec: add tests for cyclic deps
test/formula_installer_spec: add tests for cyclic deps

JCount/brew,EricFromCanada/brew,Homebrew/brew,MikeMcQuaid/brew,sjackman/homebrew,claui/brew,claui/brew,vitorgalvao/brew,Homebrew/brew,nandub/brew,EricFromCanada/brew,claui/brew,nandub/brew,MikeMcQuaid/brew,nandub/brew,JCount/brew,JCount/brew,vitorgalvao/brew,Homebrew/brew,Homebrew/brew,sjackman/homebrew,EricFromCanada/brew,EricFromCanada/brew,vitorgalvao/brew,vitorgalvao/brew,sjackman/homebrew,claui/brew,nandub/brew,sjackman/homebrew,JCount/brew,MikeMcQuaid/brew,MikeMcQuaid/brew