compiz jobs only need to be run once when using amdgpu drivers

amdgpu driver allows GPU offloading, which means a device can use the integrated GPU (iGPU) for most of the tasks (displaying the desktop…) while some applications can be run using the discrete GPU (dGPU).

This means that only a few jobs need to be run when using a device with amdgpu drivers:

 - graphics/2_glxgears_.*
 - graphics/2_video_.*
 - suspend/2_glxgears_after_suspend_.*_xenial
 - suspend/2_video_after_suspend_.*_xenial

Note: currently, amdgpu-pro drivers use a method similar to fglrx (on Trusty) or nVidia Settings, which means user has to manually switch between the GPUs and restart the session to take the modifications into account, so the above modification is only for amdgpu open source stack, not amdgpu-pro one.

In other words:
Tests to be run in any case:
    all tests related to integrated GPU (.*/1_.*)
    graphics/2_glxgears_.*
    graphics/2_video_.*
    suspend/2_glxgears_after_suspend_.*_xenial
    suspend/2_video_after_suspend_.*_xenial

Tests to be run only if dGPU is NOT amdgpu:
    graphics/2_switch_card_.*_xenial
    graphics/2_maximum_resolution_.*
    graphics/2_driver_version_.*
    graphics/2_compiz_check_.*
    graphics/2_rotation_.*
    graphics/2_minimum_resolution_.*
    graphics/2_cycle_resolution_.*
    monitor/2_powersaving_.*
    monitor/2_dim_brightness_.*
    monitor/2_displayport_.*
    monitor/2_type-c_displayport_.*
    audio/2_playback_displayport_.*
    audio/2_playback_type-c_displayport_.*
    monitor/2_dvi_.*
    monitor/2_hdmi_.*
    audio/2_playback_hdmi_.*
    monitor/2_thunderbolt_.*
    monitor/2_thunderbolt3_.*
    audio/2_playback_thunderbolt_.*
    audio/2_playback_thunderbolt3_.*
    monitor/2_rca_.*
    monitor/2_svideo_.*
    monitor/2_vga_.*
    monitor/2_multi-head_.*
    suspend/2_resolution_before_suspend_.*_xenial
    suspend/2_suspend_after_switch_to_card_.*_xenial
    suspend/2_suspend-time-check_.*_xenial
    suspend/2_suspend-single-log-attach_.*_xenial
    suspend/2_compiz_check_after_suspend_.*_xenial
    suspend/2_driver_version_after_suspend_.*_xenial
    suspend/2_resolution_after_suspend_.*_xenial
    suspend/2_display_after_suspend_.*_xenial
    suspend/2_cycle_resolutions_after_suspend_.*_xenial
    suspend/2_xrandr_screens_after_suspend_.*.tar.gz_xenial
    power-management/2_hibernate_advanced_.*
    power-management/2_hibernate-single-log-attach_.*