Migration to Lucene 4.9.0. Indexing, faceting and searching are working. Errors on CaseInsensitiveFieldComparatorSource.
Fix sort accross multiple languages.
Fix test failing due to change on indexing any field. This should not happen as the scale denominator 50000 should be part of the suggestion in the test. This need more investigation to identify why this is not part of the index terms.
Merge remote-tracking branch 'origin/stable-develop' into improvements/update-to-lucene-4.9.0

Conflicts:
	core/src/main/java/org/fao/geonet/kernel/search/LuceneSearcher.java
Cleaning.
Cleaning.
Cleaning.
Merge pull request #606 from fxprunayre/improvements/update-to-lucene-4.9.0

Update to lucene 4.9.0
Delete metadata / Add a parameter to not create backup file. This will allow to avoid failure if 2 records with same UUID are inserted using CSW #609
CSW / GetCapabilities does not report correct URL in multinode mode #610.
Update default db configuration.
CSW / Add INSPIRE config.
Merge remote-tracking branch 'upstream/stable-develop' into stable-develop

Conflicts:
	web/src/main/webapp/xml/csw/capabilities_inspire.xml
Update default db creation.
Add logos.
Configure thesaurus.
Drop unused logos.