increase default PARALLEL_NODE_GROUP_SIZE => 20

Change-Id: Ib7bc49d577f7ebf4da2267c8b99da505ee549522
diff --git a/jenkins/client/job/salt-models/tests.yml b/jenkins/client/job/salt-models/tests.yml
index c6c54bb..ec0792e 100644
--- a/jenkins/client/job/salt-models/tests.yml
+++ b/jenkins/client/job/salt-models/tests.yml
@@ -47,7 +47,7 @@
                 default: "gerrit"
               PARALLEL_NODE_GROUP_SIZE:
                 type: string
-                default: "9"
+                default: "20"
               FORMULAS_SOURCE:
                 type: string
                 default: "{{formulas_src}}"
@@ -153,7 +153,7 @@
                 default: "gerrit"
               PARALLEL_NODE_GROUP_SIZE:
                 type: string
-                default: "9"
+                default: "20"
               FORMULAS_SOURCE:
                 type: string
                 default: "{{formulas_src}}"
@@ -233,7 +233,7 @@
                 description: "Extra vars passed as YAML"
               PARALLEL_NODE_GROUP_SIZE:
                 type: string
-                default: "5"
+                default: "20"
         test_mk_cookiecutter_templates:
           name: test-mk-{{cookiecutter_template}}
           jobs: