Fix default date_format

[Hipska]

Base information

Question	Answer
Related to a SourceForge thread / Another PR / Combodo ticket?	#45
Type of change?	Bug fix

Symptom

Some collectors didn't seem to synchronise a date(time) field anymore (since 1.4.0)

Reproduction procedure

1. With teemip-ip-discovery-collector 3.1.3
2. Run a collection + synchro
3. Then observe in iTop that the Last discovery date isn't updated.

Cause

itop-data-collector-base 1.4.0 introduced a new setting with a default value which wasn't the same as the previous behaviour.

Proposed solution

Use the previous behaviour as the default value for the date_format setting. The other change provides useful debug data even when no errors detected on the import, like:

0: Wrong format for DATETIME column 3: ‘2024-06-13 14:05:09’ does not match the expected format: ‘Y-m-d’ (column skipped)

Checklist before requesting a review

• I have performed a self-review of my code, and that it's compliant with Combodo's guidelines
• I have tested all changes I made on an iTop instance
• I have added a unit test, otherwise I have explained why I couldn't
• I have made sure the PR is clear and detailled enough so anyone can understand the real purpose without digging in the code