actions/get_result has a different default timeout.

[evshary]

As described #369, it would be better to have a different default timeout for get_result service in ROS 2 action.

Here are some questions:

1. I set the timeout to 300 seconds, but is that enough for most user cases?
2. Should we separate the actions/get_result from the queries_timeout in the configuration file?

[github-actions]

PR missing one of the required labels: {'internal', 'breaking-change', 'dependencies', 'new feature', 'enhancement', 'bug', 'documentation'}

[github-actions]

PR missing one of the required labels: {'bug', 'dependencies', 'new feature', 'breaking-change', 'internal', 'enhancement', 'documentation'}

[JEnoch]

I made 2 minor changes to your PR:

• clarification in DEFAULT_CONFIG.json5 description
• make that the default config is reflected in the log, instead of being displayed as None. Thus the configured timeout is more clear.

Please review also on your side and merge if you approve.

[evshary]

I made 2 minor changes to your PR:

• clarification in DEFAULT_CONFIG.json5 description
• make that the default config is reflected in the log, instead of being displayed as None. Thus the configured timeout is more clear.

Please review also on your side and merge if you approve.

Much better than the original one!
LGTM, but I don't have permission to merge it.