Emrah feedback

[ediril]

The following items are my feedback based on trying to create a source SDK connector. They are not addressed in this PR, we'll need to create separate tickets for them:

• Java example defines the following:

    private final String INFO = "INFO";
    private final String WARNING = "WARNING";
    private final String SEVERE = "SEVERE";

Examples should use standard logging and configured to log messages to STDOUT. Let's get rid of custom logMessages() method and these string constants.

• Update example IJ settings to Java 17

[height]

Link Height tasks by mentioning a task ID in the pull request title or commit messages, or description and comments with the keyword link (e.g. "Link T-123").

💡Tip: You can also use "Close T-X" to automatically close a task when the pull request is merged.

[alsnkline]

I created T-891872 Improve V2 Examples for Partners to track these suggestions