VSbuild: set VS version to VS 2017 #2753

Job	Run time
build-drivers-release	5m 47s
build-all-debug	4m 54s
build-all-debug-single	3m 35s
build-postlib-release	10m 19s
build-test-uadriver-debug	2m 5s
rtest-modules-debug	5m 45s
rtest-module-drivers	2m 16s
build-interfaces-release	3m 51s
build-openfast-release	3m 28s
build-fastfarm-release	10m 11s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	10s
rtest-OF	6s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	3s
rtest-OF-5MW_Land_BD_DLL_WTurb	3s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	7s
rtest-OF-linearization	4s
rtest-interfaces	6s
rtest-FF	3s
	52m 57s

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