fixed 2 bugs in withheld implementation

1. Threadlocal was not reset each request so sometime withheld is hidden even when it shouldn't

2. but with threadlocal sometimes causes elements to be removed and then metadata saved, losing the elements

Conflicts:
	web/src/main/java/org/fao/geonet/kernel/XmlSerializer.java
ISO19139 / Improve French translation (Thanks to Metawal metadata working group).
Load WMC / Fix error related to OL 2.12 update.
Load WMC / Add load.wmc service to the allowed services. Remove old intermap services.
Improve french translation.
ISO19139 / Improve support for making metadata on maps (#1250).
Merge remote-tracking branch 'origin/master'
Harvester / GeoNetwork / Add custom filter (#1260).
Properly display node name in the page title for widgets and administration pages.
Widgets / Fix create metadata link from administration on IE which does not take #create into account.
Properly initialize new logo on startup.
Merge remote-tracking branch 'upstream/master' into improvement/metadata-relation