Fix unit test messing up the transaction on Oracle
Fix unit test messing up the transaction on Oracle

Since the unit test is skipped anyway for Oracle, the dropTable() call
should be skipped as well to avoid having a leftover transaction and
cause further transactions to be nested and break the next test suites
requiring transactions.

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