set seed for all systems expect travis

Author: mllg

tests/testthat/helper_zzz.R

@@ -1,3 +1,4 @@
-set.seed(1)
+if (!identical(Sys.getenv("TRAVIS"), "true"))
+  set.seed(1)
 configureMlr(show.learner.output = FALSE)
 options(mlrMBO.show.info = FALSE, mlrMBO.debug.mode = TRUE)