Secondary sinks should receive object similar to the one received by primary sink

[RamjotSingh]

Fix Issue #992
Adds code to clone the properties in TelemetryContext as well when DeepClone is called. Also fixed missing TimeStamp clone when dealing with PageViewTelemetry.

• I ran Unit Tests locally.

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• Design discussion issue #
• Changes in public surface reviewed
• CHANGELOG.md updated with one line description of the fix, and a link to the original issue.
• The PR will trigger build, unit test, and functional tests automatically. If your PR was submitted from fork - mention one of committers to initiate the build for you.

[RamjotSingh]

@SergeyKanzhelev , @cijothomas Please trigger build.

[cijothomas]

Thanks!

[cijothomas]

@RamjotSingh There are build failures due to minor fx/style cops. Can you run locally in Release mode to see the failures.