Merge ~kissiel/plainbox-provider-snappy:fix-jobs-for-newer-stress-ng into plainbox-provider-snappy:master

[Maciej Kisielewski]

fix stress-ng invocation on newer stress-ng versions

At one point stress-ng changed the way it processess its CLI options making --class and then --sequential to blacklist stressors run.

This patch circumvents that problem.

[Jonathan Cave (jocave)]

Strange, but looks ok if required to fix it

review: Approve

diff --git a/units/stress/stress-ng.pxu b/units/stress/stress-ng.pxu
index eb3794b..9cbe615 100644
--- a/units/stress/stress-ng.pxu
+++ b/units/stress/stress-ng.pxu
@@ -28,4 +28,4 @@ _description:
 plugin: shell
 estimated_duration: 1200.0
 command:
- stress-ng --class {stress-ng-class} --sequential 0
+ stress-ng --sequential 0 --class {stress-ng-class}