Merge pull request #16564 from mppf/fix-gcc-4
Declare a constructor for ForallOptimizationInfo for GCC 4
ForallOptimizationInfo included some code that does not compile with GCC 4.4.
Replace it with a more typical C++ pattern that does compile.
I think the problematic pattern originated in PR #15713.
Reviewed by @e-kayrakli - thanks!