Enhance centcore log

[garnier-quentin]

Pull Request Template

Description

Enhance cetncore log messages.

Type of change

Please delete options that are not relevant.

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software
• Updating documentation (missing information, typo...)

Target serie

Please delete series that are not relevant.

• 18.10.x
• 19.04.x (master)

How this pull request can be tested ?

Look message in centcore log message. You should find 'INFO', 'DEBUG' or 'ERROR'.

Checklist

Community contributors & Centreon team

• I followed the coding style guidelines provided by Centreon
• I have commented my code, especially new classes, functions or any legacy code modified. (docblock)
• I have commented my code, especially hard-to-understand areas of the PR.
• I have made corresponding changes to the documentation.
•  I have rebased my development branch on the base branch (master, maintenance).
• I have updated the release note in dedicated temporary section *

Centreon team only

• I have made sure that the unit tests related to the story are successful.
• I have made sure that unit tests covers 80% of the code written for the story.
• I have made sure that acceptance tests related to the story are successful (local and CI)

[adr-mo]

Merged on master and 18.10.x