Remove dangerous thread-unsafe accessors of RHistConcurrentFill (#4708)
Remove dangerous thread-unsafe accessors of RHistConcurrentFill (#4708)


root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,karies/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,karies/root,root-mirror/root,root-mirror/root,karies/root,karies/root,olifre/root,root-mirror/root,olifre/root,karies/root,karies/root