Application Insights Java SDK 2.2.1

Welcome to Application Insights Java SDK 2.2.1 and Application Insights SpringBoot Starter 1.1.1-BETA! This service release brings critical bug fixes and enhancement.

Enhancements:

1. Added support for writing diagnostic logs to file for Application Insights Java Agent.
2. Added ability to configure FileLogger for SpringBootStarter.

Deprecations:

1. Deprecated InternalAgentLogger in favor of InternalLogger for better consistency.

Bug Fixes:

1. Fixed #767. Updated gRPC dependencies which includes latest Netty version.
2. Fixed #751. Added support for absolute paths for log file output.