fix logging configuration path by adding a missing / (#662)

[landryb]

only point at log4j2.properties in the georchestra datadir, apparently that property doesn't have the support for config path priorities

fixes #662

[landryb]

given how severe and annoying this is, this is blocking 2023.02.00 final release.

[offtherailz]

@landryb it is ok from the mapstore point of view. For your installations, there a condition where the file is not present ?
We didn't verified if this use case, because there was always at least one file, did you?
I can suggest if this condition can happen, just in case.

[landryb]

@landryb it is ok from the mapstore point of view. For your installations, there a condition where the file is not present ?
We didn't verified if this use case, because there was always at least one file, did you?

running georchestra components without the datadir is not supported :)