make the exportLogDataToJSON supporting the ZonedDateTime format

[mickaelgobbo]

Expected Behaviour

This should be fine to have the different exportLogDataToJSON method supporting the java.time.ZonedDateTime format.

Actual Behaviour

Currently it's not the case, and in the structure of the logData which need to be exported, if a java.time.ZonedDateTime is present, we have the issue:

Encountered error while exporting the log data to a JSON file.
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/time 
type `java.time.ZonedDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling (through 
reference chain: java.util.ArrayList[0]->java.util.HashMap["timestamp"])

[baubakg]

problem reproduced

[baubakg]

Two elements:

• We should be resilient, as in we need to throw errors in a correct fashion. There should be a dedicated exception, with proper workaround mechanisms
• We should use the Jacksons java8 datetime mechanisms