[MD] Meta issue from bug bash

[kristenTian]

Data source

• Provide valid OpenSearch Dashboards' document link
• Create Data source with roles of no relevant permission - should render proper error state
• After save the data source updates, should stay on current page

Index Pattern

• [MD] multiple datasource doesn't throw 401 error as expected when security plugin enabled  #2591
• [MD] Allow create index patterns for indices with same name but from different datasources. #2597
• Create index pattern with data source with bad endpoint, and toggle Include system and hidden indices, spinner keep spinning -- should render proper error state #2598

Discover

• Prepend <datasource-name>. to index pattern name to differentiate across data sources #2599

[kristenTian]

closing for scope of 2.4 are done.