updated to use locust 2.9.0

Author: yorek

test/docker/dockerfile

@@ -1,2 +1,2 @@
-FROM locustio/locust:2.2.3
+FROM locustio/locust:2.9.0
 RUN pip3 install Faker

test/locust-arm-template.json

@@ -35,7 +35,7 @@
  }
  },
  "variables": {
- "image": "yorek/locust:2.2.3",
+ "image": "yorek/locust:2.9.0",
  "cpuCores": "1",
  "masterMemoryInGb": "2",
  "clientMemoryInGb": "2",