Snapshot console

call snapshot console ommand if there are are arguments to snapshot
Remove NFS and Samba export creation from share details page.
Modify formatting for no export message.
Remove actions from nfs exports table
Merge pull request #407 from Mchakravartula/issue#406_RemoveExportCreationInShareDEtail

Remove NFS and Samba export creation from share details page.
Merge branch 'issue#395_snapshot_cli' of git://github.com/sujeetsr/rockstor-core into sujeetsr-issue#395_snapshot_cli
Use api_error decorator for share detail and snapshot consoles
fix bug in batch mode cli where the first argument is being ignored.
return -1 when a cli command fails.
parse onecmd differently for commands executed over ssh.
support uvisible flag for snapshots from cli.