Properly format the share expiration time for the database, fixes bug oc-1779
Properly format the share expiration time for the database, fixes bug oc-1779

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