Fix --walltime parsing for sub_test

When passing --walltime to the executable (for slurm and pbs) the string we
created was only valid for times under 100 minutes. After that it became
invalid. We never run into this in nightly testing, but I ran into it when
trying to see how long hpl release would take to finish for gasnet+mpi
Skip anonymous iter optimization test for llvm

Mike pointed out that this test started failing for llvm. It's a test that
essentially greps the generated code to make sure the optimization fired. It's
greping the c code, so it needs to be skipped for llvm.
Merge pull request #1061 from ronawho/elim-anonymous-range-construction

Skip anonymous iter optimization test for llvm

Mike pointed out that this test started failing for llvm. It's a test that
essentially greps the generated code to make sure the optimization fired. It's
greping the c code, so it needs to be skipped for llvm.
Merge pull request #1045 from ronawho/fix-sub-test-walltime-parsing

Fix --walltime parsing for sub_test

[reviewed by @thomasvandoren]

When passing --walltime to the executable (for slurm and pbs) the string we
created was only valid for times under 100 minutes. After that it became
invalid. We never run into this in nightly testing, but I ran into it when
trying to see how long hpl release would take to finish for gasnet+mpi
Make HPCCProblemSize.notest own file instead of symlink from original location

Making it a symlink was unnecessary laziness on my part, as notests are just
empty files.
Merge pull request #1062 from lydia-duncan/resolveSymlinkPerfErrors1

Make HPCCProblemSize.notest own file instead of symlink from original location

Making it a symlink was unnecessary laziness on my part, as notests are just
empty files.