Improve efficiency for constant values and various clean-ups. #153

Job	Run time
Install and Test (27.1)	6m 57s
Install and Test (27.1)	6m 57s
Install and Test (27.2)	6m 43s
Install and Test (27.2)	7m 2s
Install and Test (28.1)	1m 1s
Install and Test (28.1)	1m 1s
Install and Test (28.2)	48s
Install and Test (28.2)	48s
Install and Test (release-snapshot)	1m 19s
Install and Test (release-snapshot)	1m 19s
	33m 55s

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