Fixed file upload

The tests work with a workaround, you need to copy qa/server-tests/files/shallalist.tar.gz to /tmp or the SetDomainList tests will fail. I'm checking with Julio if it's a bug in the test itself or in anste. Other than that, with the changes here, the upload works again.

Zentyal Proxy objects and domain lists tests
		EnableModules: OK
		ConfigNetworkSetExternal: OK
		TestDeleteAccessRule: OK
		TestCreateProfile: OK
		ContentFilterStrict: OK
		SetDomainList: OK
		ConfigureDomainListAllowPorn: OK
		ConfigureDomainListFilterAstronomy: OK
		TestAllowPornDomain: OK
		TestDeniedAstronomyDomain: OK
		TestRemoveDomainListsFiles: OK
		SetDomainList: OK
		TestAllowPornDomain: OK
		TestDeniedAstronomyDomain: OK
		RemoveDomainListPorn: OK
		TestAllowAstronomyDomain: OK
		TestDomainListsFiles: OK
		check-zentyal-log: OK
		check-syslog-apparmor: OK