patch of rail-rna to avoid race condition

emr_simulator.patch

1064,1068d1063
<                 retries = 0
<                 while not os.path.isfile(file_or_archive):
<                     time.sleep(5)
<                     if retries > 5: break
<                     retries += 1
1426,1430d1420
<                 retries = 0
<                 while not os.path.isfile(file_or_archive):
<                     time.sleep(5)
<                     if retries > 5: break
<                     retries += 1
2056c2046
<                     args.direct_write)
---
>                     args.direct_write)
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