kms cube testcase failed due to weston.socket is not closed properly on RB4 target

[Vkenjam]

failed to set mode: Permission denied
root@iq-8275-evk:/var/Runner/suites/Multimedia/Graphics/KMSCube# kmscube -D /dev/dri/card0^C-coun=60
root@iq-8275-evk:/var/Runner/suites/Multimedia/Graphics/KMSCube# systemctl stop weston
Stopping 'weston.service', but its triggering units are still active:
weston.socket
root@iq-8275-evk:/var/Runner/suites/Multimedia/Graphics/KMSCube# systemctl stop weston.socket
root@iq-8275-evk:/var/Runner/suites/Multimedia/Graphics/KMSCube# systemctl stop weston.service
root@iq-8275-evk:/var/Runner/suites/Multimedia/Graphics/KMSCube# kmscube -D /dev/dri/card0 --coun=60
Using display 0xaaaaccc0f700 with EGL version 1.5

manually closed and then re-ran.. its passed