DS-1919 Solr Search Empty FilterQuery bug (dspace-4_x backport)
Update clean-database to drop additional tables

Updates clean-database.sql file to drop tables recently added to the
DSpace project:

-  webapp, webapp_seq
- requestitem, requestitem_seq;
DS-1998 fix the "dspace classpath" CLI command
DS-1958 Fix SolrLogger Memory Error
Language Selection _ Turkish Option
[DS-1961] Use HTTPS with oss.sonatype.org repository
Updated bte dependence to v0.9.2.4

See the relevant discussion here: https://jira.duraspace.org/browse/DS-1971
DS-2013 implement ItemDAOOracle to fix thumbnails in browse
DS-1906: Adds configurable option to reconvert shibboleth attributes.
Reconvert shibboleth attribute only if it is neither null nor empty.
DS-1957 xml workflow script incorrect for oracle
Merge pull request #501 from helix84/DS-1919-jspui-empty-filterquery-dspace-4_x

DS-1919 Solr Search Empty FilterQuery bug (dspace-4_x backport)
Fix a few typo.s.
DS-2038 Oracle DB Script minor error
Merge pull request #565 from bram-atmire/dspace-4_x

DS-2038 Oracle DB Script minor error
remove html output from rest
Close context at end of REST request to community

- Following advice from Richard Rodgers at OR14
DS-1986 Get new context each time, close in finally, for all REST methods
[DS-2060] Extended SOLR commit duration due to SpellCheckComponent ("Did you mean")
Merge pull request #569 from bram-atmire/dspace-4_x

[DS-2060] Extended SOLR commit duration due to SpellCheckComponent ("Did you mean")