test: Use "fedora-21" as the default TEST_OS.

Closes #1119
Reviewed-by: Stef Walter <stefw@redhat.com>
test: Don't check journal after failure.

Not all 'allow_journal_messages' might have been seen and the check
might thus find false positives.  Also, throwing from tearDown in
check-multi-machine will cause the snapshotting to be skipped.

Closes #1133
Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Show storage IO totals in bytes/sec

Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Disconnect all event handlers on storage page

And don't create a second D-Bus client.

Closes #1156
Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Right styling for journal load button

Fixes #1170
Closes #1177
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
shell: more descriptive first title

Changes the opening page after logging in from "All "to "Hosts" in order
to add clarity.

Fixes #860
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
shell: Say "Add Host" instead of "Add Server".

Closes #1169
shell: Improve "Add VLAN" dialog.

By offering a default parent and ID and updating the default name as
the user types.

Fixes #1079