Bump jnlp slave docker image version

PROD-34405

Change-Id: I34cd360d2bcf77e8e16d7c7ccc53dd9dcc1b4293
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index d35d8fe..2464d3b 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -18,7 +18,7 @@
     docker_image_mysql: "${_param:mcp_docker_registry}/mirantis/cicd/mysql:2019.2.6"
     # jenkins:2.150.3
     docker_image_jenkins: "${_param:mcp_docker_registry}/mirantis/cicd/jenkins:2019.2.5"
-    docker_image_jenkins_jnlp_slave: "${_param:mcp_docker_registry}/mirantis/cicd/jnlp-slave:2019.2.6"
+    docker_image_jenkins_jnlp_slave: "${_param:mcp_docker_registry}/mirantis/cicd/jnlp-slave:2019.2.8"
     # TODO: fix tag
     docker_image_jenkins_ssh_slave: "${_param:mcp_docker_registry}/mirantis/cicd/ssh-slave:2019.2.5"
     # model-generator