add telemetry in application insights

[yungezz]

Summary

add telemetry in application insights. and property to enable/disable telemetry configuration. and doc update.

Issue Type

• New Feature

Starter Names

• active directory spring boot starter
• documentdb spring boot starter
• key vault spring boot starter
• media services spring boot starter
• service bus spring boot starter
• storage spring boot starter

Additional Information

"ReformatCode" in IntelliJ

[gavlyukovskiy]

We've already done this and more in the application insights repository: microsoft/ApplicationInsights-Java#646

There is auto-configuration for TelemetryClient and all applications insights modules out of the box.
We had intention to do PR here once it is ready, but it's still in testing phase.

[yungezz]

@gavlyukovskiy HI Arthur, I've aware of the PR to build application insight spring boot starter. But they're 2 different things comparing with this PR. This PR initial is to collect telemetry in our spring boot starters to application insight, it's internal usage, not user-oriented.

• ai key is not set as property, we dont alllow user to set ai key.
• telemetryclient is not exposed to user as bean. it's internal used.

Hope this clarifies.