Disable stack traces for development/testing logger

[khushijain21]

What does this PR do?

Development/Testing logger by logp library prints stack strace at error/warn level which can be mistaken for a panic. To avoid this confusion, we disbale the stack traces in this PR.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works

Related issues

• Relates Restore behaviour of not having test logs on stdout/stderr by default #329

[elasticmachine]

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• Commit: 86fb4f3

[mauri870]

LGTM, if I understand this correctly it is simply restoring previous behavior.