This function constructs a list of options to be parsed when
solver is set to Gurobi. This function really
implements some default values, and accounts for the debug
option.
optionsGurobi(options, debug)list. The list should be structured the same way as
if one were using the gurobi library directly. That is,
the name of each item must be the name of the option, and is
case sensitive. The value assigned to each item is the value to
set the option to.
boolean, indicates whether or not the function should provide output when obtaining bounds. The output provided is the same as what the Gurobi API would send to the console.
list, the set of options declared by the user, including
some additional default values (if not assigned by the user)
and accounting for debug.