Command line tests

Precondition for all test is, that the D-Bus session is launched:
$export `dbus-launch`

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Interface:
org.agl.inputevent

Method:
    <method name="hardKeyPressed">
      <arg name="key" type="i" direction="in"/>
    </method>

Preconditions:
- HomeScreen app is running
- InputEventManager app is running

Test:
$dbus-send --session --type=method_call --print-reply --dest=org.agl.inputeventmanager /InputEvent org.agl.inputevent.hardKeyPressed int32:0