Description of problem:
Music fails to start.

Version-Release number of selected component (if applicable):
gnome-music-3.10.1-1.fc20.i686
1:dbus-1.6.12-8.fc20.i686
python-2.7.5-9.fc20.i686
tracker-0.16.4-2.fc20.i686

How reproducible:
Every time.

Steps to Reproduce:
1. Install Music using Software.
2. Open Music from the Activities overview.
3. Open Terminal and run `gnome-music`.

Actual results:
Music fails to start. Terminal says:

$ gnome-music
Traceback (most recent call last):
  File "/usr/bin/gnome-music", line 32, in <module>
    from gnomemusic.application import Application
  File "/usr/lib/python3.3/site-packages/gnomemusic/application.py", line 36, in <module>
    from gnomemusic.window import Window
  File "/usr/lib/python3.3/site-packages/gnomemusic/window.py", line 39, in <module>
    import gnomemusic.view as Views
  File "/usr/lib/python3.3/site-packages/gnomemusic/view.py", line 45, in <module>
    import gnomemusic.widgets as Widgets
  File "/usr/lib/python3.3/site-packages/gnomemusic/widgets.py", line 43, in <module>
    tracker = Tracker.SparqlConnection.get(None)
gi._glib.GError: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)


Expected results:
Music should start.