Testcase ibus gnome shell

Description

This test-case is to check ibus with gnome-shell which is available f16 or later.

How to test

Currently you need to install ibus-gnome3 with 'yum install ibus-gnome3' by manual. gnome-shell requires a physical graphics card which supports 3D acceleration. If you run a classic GNOME with compiz-gnome, you could enable gnome-shell with 'gnome-shell --replace'. Also you could go back to metacity with 'metacity --replace'.

1. General test:
   1. Focus on a text application (e.g. gedit or gnome-terminal) and type the ibus trigger key (e.g. Control + Space) several times.
2. IBus settings:
   1. Click on ibus status icon and choose "Preferences" menu item.
3. Keymap settings:
   1. Click on ibus status icon and choose "Keyboard configuration" menu item.
4. Lookup window test:
   1. Focus on a text application and type an ibus trigger key (e.g. Control + Space) and type a char and Space key sevaral time to show the ibus lookup window.

Expected Results

1. General test: ibus status icon shows language characters (e.g. 'us') for the keymap engines and IM symbol characters (e.g. 'あ') for IM engines (e.g. ibus-anthy).
2. IBus settings: ibus-setup is launched.
3. Keymap settings: 'gnome-control-panel region' is launched.
4. Lookup window test: clutter based lookup window is shown.