[Backport 2.x] Change class name to decouple styling from discover #1005

Job	Run time
Run test group of app_analytics_test	16m 27s
Run test group of datasources_test	10m 44s
Run test group of event_analytics_test	20m 57s
Run test group of integrations_test	11m 59s
Run test group of metrics_analytics_test	11m 42s
Run test group of notebooks_test	14m 5s
Run test group of panels_test	19m 3s
Run test group of trace_analytics_test	27m 11s
	2h 12m 8s

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