server/tests/test_display_base: add missing set_client_capabilities, fix client_monitors_config signature
server/tests/test_display_base: add missing set_client_capabilities, fix client_monitors_config signature

alon/spice-server,Fantu/spice,fgouget/spice,SPICE/spice,elmarco/spice,elmarco/spice,alon/spice-server,Fantu/spice,ya-mouse/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,elmarco/spice,ya-mouse/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,fgouget/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,SPICE/spice,Fantu/spice,ya-mouse/spice,SPICE/spice,elmarco/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,Fantu/spice