[BUG]Integration only supports a single index / index-pattern for the entire integration

[YANG-DB]

What is the bug?
When creating a new integration that contains a dashboard or multiple dashboards that are based on more than one index and more than one index-pattern - the integration doesn’t instantiates correctly

How can one reproduce the bug?
Use a multiple dashboards with multi-indices/multi-index patterns and the instantiated dashboards will experience visible errors

What is the expected behavior?
An integration should support all the underlying indices and index-patterns

In practice the existing schema capabilities of the integration actually implies that the integration can support multiple indices and index-patterns since it already supports multiple index mapping - but this is not the case...

[YANG-DB]

@Swiddis
This has also arrived from external submitted Issue