test-bot: put exception, retry on missing formula.
test-bot: put exception, retry on missing formula.

This will be useful in debugging (and recovering from) the situation
where sometimes formulae can't be found when specifying multiple on the
command-line.

pseudocody/brew,gregory-nisbet/brew,hanxue/linuxbrew,vitorgalvao/brew,mahori/brew,tonyg/homebrew,MikeMcQuaid/brew,vitorgalvao/brew,DomT4/brew,Homebrew/brew,claui/brew,MikeMcQuaid/brew,nandub/brew,MikeMcQuaid/brew,JCount/brew,hanxue/linuxbrew,zmwangx/brew,JCount/brew,reelsense/brew,EricFromCanada/brew,zmwangx/brew,claui/brew,reitermarkus/brew,rwhogg/brew,DomT4/brew,nandub/brew,Linuxbrew/brew,palxex/brew,jmsundar/brew,reelsense/brew,gregory-nisbet/brew,amar-laksh/brew_sudo,tonyg/homebrew,mgrimes/brew,ilovezfs/brew,claui/brew,tonyg/homebrew,reelsense/brew,aw1621107/brew,pseudocody/brew,toonetown/homebrew,mahori/brew,EricFromCanada/brew,gregory-nisbet/brew,alyssais/brew,ilovezfs/brew,jmsundar/brew,vitorgalvao/brew,reitermarkus/brew,DomT4/brew,Homebrew/brew,EricFromCanada/brew,maxim-belkin/brew,vitorgalvao/brew,maxim-belkin/brew,Linuxbrew/brew,konqui/brew,muellermartin/dist,sjackman/homebrew,mahori/brew,alyssais/brew,reitermarkus/brew,sjackman/homebrew,konqui/brew,JCount/brew,toonetown/homebrew,nandub/brew,nandub/brew,MikeMcQuaid/brew,mgrimes/brew,maxim-belkin/brew,mahori/brew,konqui/brew,muellermartin/dist,bfontaine/brew,rwhogg/brew,Homebrew/brew,palxex/brew,palxex/brew,amar-laksh/brew_sudo,pseudocody/brew,Linuxbrew/brew,alyssais/brew,bfontaine/brew,mgrimes/brew,DomT4/brew,Linuxbrew/brew,jmsundar/brew,zmwangx/brew,rwhogg/brew,muellermartin/dist,bfontaine/brew,sjackman/homebrew,reitermarkus/brew,claui/brew,JCount/brew,sjackman/homebrew,EricFromCanada/brew,hanxue/linuxbrew,toonetown/homebrew,ilovezfs/brew,aw1621107/brew,konqui/brew,amar-laksh/brew_sudo,aw1621107/brew,Homebrew/brew