Add testcases and update documents for HedgeHog stable releases #174

Job	Run time
unit-test	2m 21s
lint	57s
acceptance-test-runtime-env (7.0.0)	3m 38s
acceptance-test	2m 27s
acceptance-test-runtime-env (7.1.0)	3m 53s
acceptance-test-runtime-env (7.2.0)	3m 50s
acceptance-test-runtime-env (7.3.0)	3m 51s
acceptance-test-runtime-env (7.4.0)	3m 36s
acceptance-test-runtime-env (8.0.0)	4m 21s
acceptance-test-runtime-env (8.1.0)	4m 7s
acceptance-test-runtime-env (8.2.0)	3m 44s
acceptance-test-runtime-env (8.3.0-alpha16)	3m 49s
acceptance-test-runtime-env (4.2.0, 6.7.1)	4m 7s
acceptance-test-runtime-env (4.2.0, 7.0.2)	3m 39s
	48m 20s

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