Upgrade builder to Ubuntu 18.04 for docker-verify jobs

Upgrade scopes integration project jobs.

Change-Id: Ie7b49e552d127be34da338b2a0a606692b926ddb
Issue-ID: INT-1502
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
diff --git a/jjb/integration/integration-templates-docker.yaml b/jjb/integration/integration-templates-docker.yaml
index a01e82f..0bf3097 100644
--- a/jjb/integration/integration-templates-docker.yaml
+++ b/jjb/integration/integration-templates-docker.yaml
@@ -2,7 +2,7 @@
 - job-template:
     name: '{project-name}-{stream}-{subproject}-docker-merge'
     project-type: freestyle
-    node: 'ubuntu1604-docker-8c-8g'
+    node: 'ubuntu1804-docker-8c-8g'
     docker-image-name: ''
 
     properties:
@@ -64,7 +64,7 @@
 - job-template:
     name: '{project-name}-{stream}-{subproject}-docker-verify'
     project-type: freestyle
-    node: 'ubuntu1604-docker-8c-8g'
+    node: 'ubuntu1804-docker-8c-8g'
     docker-image-name: ''
 
     properties: