Updates to openfast_io to match current dev branch API #3688

Job	Run time
build-postlib-release	10m 27s
build-drivers-release	4m 29s
build-all-debug	6m 9s
build-all-debug-single	2m 56s
build-test-uadriver-debug	1m 34s
rtest-module-drivers	6s
rtest-modules-debug	3s
build-interfaces-release	4m 48s
build-fastfarm-release	12m 38s
build-openfast-release	4m 37s
rtest-OF-simulink	11m 6s
rtest-OF-5MW_Land_AeroMap	1m 29s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 10s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	2m 13s
rtest-OF	15m 35s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 3s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	2m 9s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 53s
rtest-OF-linearization	4m 35s
rtest-openfast_io	6m 54s
rtest-interfaces	3m 24s
rtest-FF	2m 24s
	1h 46m 42s

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