BeamDyn performance improvements #3343

Job	Run time
build-all-debug-single	3m 23s
build-postlib-release	9m 15s
build-all-debug	4m 38s
build-drivers-release	5m 18s
build-test-uadriver-debug	2m 3s
rtest-modules-debug	4m 33s
rtest-module-drivers	2m 6s
build-fastfarm-release	10m 40s
build-openfast-release	3m 32s
build-interfaces-release	3m 25s
rtest-interfaces	3m 49s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4m 30s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 2s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	3m 9s
rtest-OF	6m 13s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 39s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	1m 5s
rtest-OF-linearization	3m 45s
rtest-FF	2m 42s
	1h 17m 47s

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