Build

Fix Tomcat metric definitions to aggregate multiple MBeans. #2696

Job	Run time
build	1m 14s
integration-test	6m 27s
test (8)	1m 48s
test (11)	1m 54s
test (17)	1m 24s
test (20)	1m 35s
markdown-lint-check / markdown-lint-check	9s
markdown-link-check / markdown-link-check	1m 41s
misspell-check / misspell-check	4s
shell-script-check / shell-script-check	7s
required-status-check	1s
publish-snapshots (skipped)	7s
	16m 31s

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