Fix OpenCloud adapter exists always return false
Fix OpenCloud adapter exists always return false

Should fix #160
alex88/Gaufrette,WayOfBrave/Gaufrette,NiR-/Gaufrette,watermanio/Gaufrette,alex88/Gaufrette,peelandsee/Gaufrette,acucchieri/Gaufrette,1001Pharmacies/Gaufrette,ronaldlopez/Gaufrette,KnpLabs/Gaufrette,jenkoian/Gaufrette,ronaldlopez/Gaufrette,jenkoian/Gaufrette,watermanio/Gaufrette,acucchieri/Gaufrette,NiR-/Gaufrette,Consoneo/Gaufrette,igormukhingmailcom/Gaufrette,igormukhingmailcom/Gaufrette,WayOfBrave/Gaufrette,KnpLabs/Gaufrette,1001Pharmacies/Gaufrette