Remove extra GetNewUnit calls from AD14 #1185

Job	Run time
build-all-debug	4m 38s
build-all-debug-single	3m 15s
build-drivers-release	5m 12s
build-postlib-release	9m 34s
build-test-uadriver-debug	2m 13s
rtest-modules-debug	4m 15s
rtest-module-drivers	2m 8s
build-openfast-release	3m 42s
build-fastfarm-release	8m 42s
build-interfaces-release	3m 25s
rtest-interfaces	5m 10s
rtest-OF	4m 53s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	1m 28s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4m 51s
rtest-OF-5MW_Land_BD_DLL_WTurb	4m 52s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	4m 52s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	4m 57s
rtest-OF-linearization	4m 57s
rtest-FF	1s
	1h 23m 5s

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