Added a simple transmission retry mechanism and capturing of exception stacktrace

[panovic]

Fix # .

For significant contributions please make sure you have completed the following items:

• Design discussion issue #
• Changes in public surface reviewed
• CHANGELOG.md updated

[msftclas]

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[dhaval24]

@panovic Thank you very much for your vital contribution towards the Application Insights Java SDK. It is really valuable. Everything seems to be fine. Just would like to know if we can add a test case for this?

[dhaval24]

@panovic also please sign CLA :-)

[dhaval24]

@panovic closing this PR as discussed because #561 fixes adds the whole reliable channel logic.