Fix EZP-22564: Fix issues uncovered by failing integration tests for Location Search implmentation

This is a combination of 9 commits:
EZP-22564: Change Search Integration Test to ignore scoring by default

@pspanja Should be tweaked further / might not be the right approach.

EZP-22564: Change solr Handler to give more error info

EZP-22564: Fix failing UserMetadata::GROUP support in Location search

EZP-22564: Fix failure with empty location field, skip empty values

EZP-22564: Small improvments to Content schema

EZP-22564: Fix main location issue caused by missing int cast on mainLocationId

EZP-22564: Skip testSearchOnNotExistingLanguageGivesException on Solr, not clear SPI search should have to validate Criterion values

EZP-22564: Cleanup old unused markTestSkipped in SearchServiceTest

EZP-22564: Impl Depth criterion for content search