[M-Schwab]

Motivation

Exposes the C++ ClientConfiguration::setKeepAliveIntervalInSeconds to python. On a slow or conogested link, a live connection can be quite for longer than that - so allows users to configure this option.

Modifications

• Bind ClientConfiguration::getKeepAliveIntervalInSeconds / setKeepAliveIntervalInSeconds in src/config.cc as keep_alive_interval_in_seconds.
• Add keep_alive_interval_seconds: int = 30 to pulsar.Client, documented and validated (an int greater than 0), and pass it to the configuration.

Verifying this change

• Make sure that the change passes the CI checks.

This change added tests and can be verified as follows:

• test_client_argument_errors covers a non-int and a non-positive keep_alive_interval_seconds.

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API: a new optional keep_alive_interval_seconds argument to pulsar.Client (and so pulsar.asyncio.Client); the default keeps the current behavior
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment