[Cbc] Proposed change to cbc unit test

[Lou Hafer]

Folks,

	The cbc unit test currently solves p0033 and p0201, both pure binary 
IPs. I'd like to add flugpl, which is small but has general integer and 
continuous variables. This provides better test coverage. Flugpl is not 
part of Data/Sample. The easy solution for cbc is to point the unit test 
at Data/Miplib instead of Dir/Sample. The alternative is to add flugpl 
to Data/Sample.

	I will point the unit test at Data/Miplib if no one objects within a 
day or two. If anyone has other suggestions for unit test problems (they 
should be small and solve quickly), speak up.

						Lou