Add SPhenoInput block such that the SLHA file can be used to benchmark
SPheno as well
Prevent ConditionalExpression[] in the solution output.

In Mathematica 9, usually ConditionalExpression[] appears in the output.
I.e.

 In:= Solve[y Log[x] == z, x]
 Out= {{x -> ConditionalExpression[E^(...), -Pi < Im[...] <= Pi]}}

But we assume anyway that the parameters are real, so we can restict
the solution to be on the real domain.
Add test which checks for a Mathematica 9 bug