Surpress Spring Boot Cli INFO console output

[matiwinnetou]

I think for java developers it may not be as disturbing to see spring logs at the beginning but from what it appears developers of other languages maybe intimidated by this.

Ways to solve:

• log4j / logback log level for spring to ERROR only
• remove spring-cli and use more vanilla style libraries (e.g. https://github.com/kohsuke/args4j)

[satran004]

I will try to suppress the Logback log messages first, as changing the framework might require a lot of work. In the past, we were able to suppress these INFO logs, but they reappeared after the framework upgrade. Let's look into it again.