Collection id , Manager          , CVR type  , Contests 
DEN-A01       , abe@co.gov       , CVR       , DEN-prop-1 , DEN-prop-2 , US-Senate-1 
DEN-A02       , bob@co.gov       , CVR       , DEN-prop-1 , DEN-prop-2 , US-Senate-1 
LOG-B13       , carol@co.gov     , noCVR     , LOG-mayor  , US-Senate-1, 


Collection id , Manager          , CVR type  , Required Contests, Possible Contests
DEN-A01       , abe@co.gov       , CVR       , DENVER,            DENVER
DEN-A02       , bob@co.gov       , CVR       , DENVER,            DENVER
LOG-B13       , carol@co.gov     , noCVR     , LOGANREC,          LOGANPOSS


Modify ex1 election example: collections file has required and possible contests.
Modify ex1 election example: collections file has required and possible contests.
