core: Creating SPM task in failed state ...

Creating SPM task in failed state in case of network error in
create snapshot command

Bug-Url: https://bugzilla.redhat.com/982003
Change-Id: I037f65b13eabffec39dbdc620a75c515e6ce796a
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>