Fixed cta/CTA#863 Prevent SQLite database files from being used as the CTA catalogue database backend

Created cta-lib-catalogue so that cta-migration-tools can avoid requiring cta-lib which in turn requires librados2

Removed 'LEFT OUTER JOIN' clauses from the SQL statement of RdbmsCatalogueGetDeletedArchiveFilesItor

Removed deadwood forward declaration of Catalogue class from ArchiveFileItor and DeletedArchiveFileItor

Removed superfluous copy of rdbms::Conn object passed to RdbmsCatalogueGetArchiveFilesItor() constructor.

Do not use cta-catalogue-schema-drop to wipe a sqlite database because in this case we need to cleanup the full database directory

Conflicts:
	cmdline/CtaAdminCmdParse.hpp