Properly call parent::tearDown() in MDB2SchemaManager::tearDown().
Properly call parent::tearDown() in MDB2SchemaManager::tearDown().

The early return introduced by 04c982a96e19f2254739c24ee8c6b568edcb4190
prevents parent::tearDown() being called on Oracle.

xx621998xx/server,pmattern/server,Ardinis/server,endsguy/server,endsguy/server,sharidas/core,nextcloud/server,xx621998xx/server,pixelipo/server,xx621998xx/server,andreas-p/nextcloud-server,sharidas/core,owncloud/core,pollopolea/core,lrytz/core,bluelml/core,pmattern/server,whitekiba/server,owncloud/core,andreas-p/nextcloud-server,Ardinis/server,endsguy/server,Ardinis/server,sharidas/core,owncloud/core,IljaN/core,pixelipo/server,pixelipo/server,whitekiba/server,xx621998xx/server,cernbox/core,IljaN/core,lrytz/core,Ardinis/server,pmattern/server,IljaN/core,pollopolea/core,phil-davis/core,pixelipo/server,andreas-p/nextcloud-server,bluelml/core,pmattern/server,cernbox/core,IljaN/core,bluelml/core,pollopolea/core,pollopolea/core,whitekiba/server,lrytz/core,xx621998xx/server,michaelletzgus/nextcloud-server,jbicha/server,bluelml/core,owncloud/core,sharidas/core,michaelletzgus/nextcloud-server,pmattern/server,nextcloud/server,cernbox/core,pixelipo/server,lrytz/core,bluelml/core,endsguy/server,lrytz/core,nextcloud/server,michaelletzgus/nextcloud-server,nextcloud/server,michaelletzgus/nextcloud-server,cernbox/core,endsguy/server,andreas-p/nextcloud-server,whitekiba/server,jbicha/server,sharidas/core,IljaN/core,owncloud/core,andreas-p/nextcloud-server,jbicha/server,cernbox/core,jbicha/server,Ardinis/server,jbicha/server,whitekiba/server,pollopolea/core