ExtLd: require use of InflowWind #3383

Job	Run time
build-all-debug-single	3m 24s
build-all-debug	7m 14s
build-postlib-release	11m 7s
build-drivers-release	5m 15s
build-test-uadriver-debug	2m 6s
rtest-module-drivers	5m 3s
rtest-modules-debug	11m 24s
build-openfast-release	5m 42s
build-interfaces-release	5m 8s
build-fastfarm-release	13m 5s
rtest-interfaces	3m 58s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	2m 9s
rtest-OF	15m 44s
rtest-OF-5MW_Land_AeroMap	1m 19s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 39s
rtest-OF-simulink	11m 57s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 10s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 44s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	2m 30s
rtest-OF-linearization	4m 31s
rtest-FF	2m 41s
	2h 3m 50s

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