[OpenMP] Change monotonicity of dynamic schedule

[Nawrin]

Summary

This patch changes the default monotonicity of dynamic schedule from monotonic to non-monotonic when no modifier is specifier.

[AndreyChurbanov]

LGTM

openmp/runtime/src/kmp_dispatch.cpp

if (__kmp_env_consistency_check) {
     }
   }
 }
 
 // Returns either SCHEDULE_MONOTONIC or SCHEDULE_NONMONOTONIC
 static inline int __kmp_get_monotonicity(ident_t *loc, enum sched_type schedule,
                                          bool use_hier = false) {
   // Pick up the nonmonotonic/monotonic bits from the scheduling type
-  // TODO: make nonmonotonic when static_steal is fixed
-  int monotonicity = SCHEDULE_MONOTONIC;
+  // Nonmonotonic as default for dynamic schedule when no modifier is specified
+  int monotonicity = SCHEDULE_NONMONOTONIC;
 
   // Let default be monotonic for executables
   // compiled with OpenMP* 4.5 or less compilers
   if (loc != NULL && loc->get_openmp_version() < 50)
     monotonicity = SCHEDULE_MONOTONIC;
 
   if (use_hier || __kmp_force_monotonic)
     monotonicity = SCHEDULE_MONOTONIC;