Fix pylint downscaling

max() was bogus -- we want *both* RAM and number of CPUs to limit the
number of jobs, not take whichever is highest.

[1] pylint-dev/pylint#1495
[2] pylint-dev/pylint#3899

Cherry-picked from master PR rhinstaller#2923

Related: rhbz#1885635

tests/pylint/censorship.py

@@ -128,7 +128,7 @@ def _prepare_args(self):
         # each process uses ~ 1.5 GiB RAM, leave some breathing space
         jobs = min(1, avail_mem_kb // 2000000)
         # but also clip to nproc
-        jobs = max(jobs, num_cpus)
+        jobs = min(jobs, num_cpus)
         print("Using", jobs, "parallel jobs based on", avail_mem_kb, "kB available RAM and",
               num_cpus, "CPUs")
         args.append("-j%i" % jobs)