Change OpenFOAM to ExtInflow in .fst files #3400

Job	Run time
build-all-debug	7m 56s
build-all-debug-single	3m 30s
build-drivers-release	6m 15s
build-postlib-release	12m 9s
build-test-uadriver-debug	3m 4s
rtest-module-drivers	4m 50s
rtest-modules-debug	11m 4s
build-openfast-release	5m 3s
build-fastfarm-release	13m 43s
build-interfaces-release	4m 41s
rtest-interfaces	3m 54s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 31s
rtest-OF-5MW_Land_AeroMap	1m 42s
rtest-OF	15m 28s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	2m 6s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	2m 12s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 25s
rtest-OF-simulink	11m 35s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 53s
rtest-OF-linearization	4m 22s
rtest-FF	2m 19s
	2h 5m 42s

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