Update comments in nodal sections of AD15 r-test files #528

Job	Run time
build-all-debug-single	3m 18s
build-drivers-release	4m 53s
build-all-debug	6m 49s
build-postlib-release	11m 8s
build-test-uadriver-debug	2m 5s
rtest-module-drivers	2m 4s
rtest-modules-debug	6m 13s
build-interfaces-release	4m 32s
build-fastfarm-release	11m 55s
build-openfast-release	4m 17s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 24s
rtest-OF	7m 42s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	1m 56s
rtest-OF-5MW_Land_AeroMap	1m 29s
rtest-OF-simulink	10m 40s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 7s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4m 44s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	56s
rtest-OF-linearization	5m 3s
rtest-interfaces	3m 28s
rtest-FF	1m 59s
	1h 38m 42s

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