The NS replica should give out tags that are over ORTE_RML_TAG_DYNAMIC
or it will overlap with other outstanding tags. This overlap was killing
MPI_Comm_spawn when a program tried to use it multiple times (> 3).
With this fix MPI_Comm_spawn is behaving properly.
A program can call it many times in a row with out problem.
NOTE: Not tested for multi-threaded build yet
(A long time debugging for a one liner... :/)
This commit was SVN r7529.
4cf4b4ea86