Fix progress bar color for failed palette to improve visibility of text

assets/stylesheets/openqa_theme.scss

@@ -34,7 +34,7 @@ $link-hover-color:            darken($link-color, 15%) !default;
 $color-softfailed:            #EEB560;
 $color-ok:                    #CDFFB9;
 $color-warning:               #ffff99;
-$color-failed:                #FF4E46;
+$color-failed:                #cc3333;
 $color-result-failed:         #FF9E9B;
 $color-incomplete:            #AF1E11;
 $color-result:                #3c3c3c;