Updates to openfast_io to match current dev branch API #3700

Job	Run time
build-all-debug-single	2m 56s
build-all-debug	6m 16s
build-postlib-release	10m 35s
build-drivers-release	4m 39s
build-test-uadriver-debug	1m 22s
rtest-module-drivers	4m 52s
rtest-modules-debug	11m 3s
build-openfast-release	5m 6s
build-interfaces-release	4m 36s
build-fastfarm-release	12m 59s
rtest-interfaces	3m 58s
rtest-OF	15m 28s
rtest-OF-simulink	11m 4s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 23s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	2m 7s
rtest-OF-5MW_Land_AeroMap	1m 32s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 1s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 46s
rtest-OF-linearization	4m 30s
rtest-openfast_io	6m 31s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	2m 17s
rtest-FF	2m 27s
	2h 3m 28s

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