Add !$OMP critical directives around some GetNewUnit/Open*File calls
#1196
| Job | Run time |
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| 4m 41s | |
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| 3m 51s | |
| 2m 4s | |
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| 3m 23s | |
| 10m 21s | |
| 2m 21s | |
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| 1m 59s | |
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| 58s | |
| 1m 46s | |
| 3m 53s | |
| 3m 14s | |
| 2m 8s | |
| 1h 18m 9s |