further work on IPG style implementation
Merge branch '2.10.3.0' of https://github.com/ESTAT/core-geonetwork.git into 2.10.3.0
Merge branch '2.10.3.0' of https://github.com/ESTAT/core-geonetwork.git into 2.10.3.0
Merge branch '2.10.3.0' of https://github.com/ESTAT/core-geonetwork.git into 2.10.3.0