Issue #1899. Fix problem with dot in database name.
Issue #2089 was fixed.
Issue #1899. Compatibility of BP indexes.
Merge remote-tracking branch 'nuvolabase/develop' into develop
Issue #1983 and issue #2090 were fixed.
Merge remote-tracking branch 'origin/develop' into develop
Issue #2097 was fixed.
SQL: supported [<field>=null]
Issues in graphdb tests and storage existence check were fixed.
Merge remote-tracking branch 'origin/develop' into develop
Issue #1899 , issue with grpahdb export/import was fixed.
Fixed issue #2103
Issue #2023. Traverse strategy breadth first strategy bug.
Issue #1899  NPE in graphdb import was fixed.
Issue #1899  NPE in graphdb import was fixed.
Merge remote-tracking branch 'origin/develop' into develop
Issue #2023. Traverse strategy breadth first strategy bug. Document field processing.
Issue #2023. Traverse strategy breadth first strategy bug. Traverse path.
Merge branch 'develop' into breadth-first-traverse
Minor: fix tests assertions