[ZEPPELIN-6112] Fix running documentation website server #3948

Job	Run time
core-modules (hadoop3, 8)	39m 37s
interpreter-test-jupyter-python-rlang (3.9, 8)	15m 58s
interpreter-test-jupyter-python-rlang (3.9, 11)	12m 31s
core-modules (hadoop3, 11)	37m 37s
interpreter-test-jupyter-python-rlang (3.7, 8)	28m 13s
default-build (8)	28m 0s
interpreter-test-jupyter-python-rlang (3.8, 8)	17m 32s
default-build (11)	25m 34s
flink-test-and-flink-integration-test (3.9, 116)	47m 12s
flink-test-and-flink-integration-test (3.9, 117)	46m 59s
interpreter-test-non-core (8)	18m 7s
flink-test-and-flink-integration-test (3.8, 115)	43m 58s
livy-0-8-with-spark-2-4-under-python37	28m 13s
interpreter-test-non-core (11)	16m 8s
spark-integration-test (3, 8)	45m 57s
zeppelin-integration-test (8)	34m 18s
spark-integration-test (3, 11)	46m 1s
spark-test (3.9, 8)	1h 2m 0s
zeppelin-integration-test (11)	28m 55s
spark-test (3.9, 11)	55m 27s
spark-test (3.7, 8)	1h 2m 5s
spark-test (3.8, 8)	1h 5m 18s
	13h 25m 40s

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