This commit adds logger plugin implementations for the Amazon
Kinesis (https://aws.amazon.com/kinesis/) and Kinesis
Firehose (https://aws.amazon.com/kinesis/firehose/) services. To support
these plugins there are a number of utility classes and functions for
AWS authentication, configuration and API integration. The logger plugin
implementations take advantage of the BufferedLogForwarder base class
for reliable buffering and batch sending of logs. In their current
implementations, the logger plugins only support sending of result logs
to these AWS services.
BufferedLogForwarder is a base class for external log forwarding schemes
that require buffering and retries. It generalizes the logic from the
existing TLSLogForwarderRunner.
The existing TLSLoggerPlugin and TLSLogForwarderRunner are refactored to
demonstrate the use of this new base class.
