search name should include registry

When doing a podman search, the so-called NAME should be the image's
fully qualified name (not index plus shortname).

```
$ sudo podman search rhel7
INDEX        NAME                                                            DESCRIPTION                                       STARS   OFFICIAL   AUTOMATED
redhat.com   registry.access.redhat.com/rhel7/rhel                           This platform image provides a minimal runti...   0
redhat.com   registry.access.redhat.com/rhel7.0                              This platform image provides a minimal runti...   0
redhat.com   registry.access.redhat.com/rhel7                                This platform image provides a minimal runti...   0
....
```

Resolves: #1208
Resolves: Bugz #1614710

Signed-off-by: baude <bbaude@redhat.com>

Closes: #1253
Approved by: rhatdan
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