fix IDM loading of exchanges (#1577) #111

Job	Run time
Check format	4m 40s
Build	4m 38s
Smoke test	4m 49s
Parallel testing (ubuntu-22.04)	20m 38s
Test gnu fortran (ubuntu-22.04)	24m 22s
Parallel testing (macos-12)	34m 53s
Test intel fortran (ubuntu-22.04, intel-classic, 2021.7)	24m 34s
Test gnu fortran (macos-12)	35m 31s
Test intel fortran (macos-12, intel-classic, 2021.7)	35m 3s
Test intel fortran (windows-2022, intel-classic, 2021.7)	38m 58s
Test gnu fortran (windows-2022)	33m 24s
	4h 21m 30s

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