A few convenience methods for URL handling and more corner cases resolving files in XSLT transforms.
Merge branch 'develop' of https://github.com/geonetwork/core-geonetwork into formatter-functions

Conflicts:
	common/src/test/java/org/fao/geonet/utils/AbstractIOTest.java
	common/src/test/java/org/fao/geonet/utils/NioPathAwareCatalogResolverMemoryFsTest.java
	common/src/test/java/org/fao/geonet/utils/NioPathAwareCatalogResolverTest.java
	core/src/main/java/jeeves/server/dispatchers/guiservices/XmlFile.java