Fix WriteOutput time written #59

Job	Run time
build-drivers-release	5m 12s
build-all-debug	5m 39s
build-all-debug-single	3m 46s
build-postlib-release	10m 33s
build-test-uadriver-debug	2m 16s
rtest-module-drivers	2m 33s
rtest-modules-debug	5m 11s
build-fastfarm-release	13m 34s
build-interfaces-release	3m 47s
build-openfast-release	4m 15s
rtest-interfaces	5m 19s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 28s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 7s
rtest-OF-5MW_Land_AeroMap	1m 23s
rtest-OF	7m 11s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	1m 52s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4m 37s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	47s
rtest-OF-linearization	2m 44s
rtest-OF-simulink	8m 59s
rtest-FF	1m 51s
	1h 35m 4s

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