Tune test-cookiecutter-reclass tests artifacts time

   *  Don't stick to amount, stick to day's

Change-Id: If34c63d31af5f06bfa243143f600922ae2a4d510
diff --git a/jenkins/client/job/salt-models/tests.yml b/jenkins/client/job/salt-models/tests.yml
index c6bd2e1..a7bdbab 100644
--- a/jenkins/client/job/salt-models/tests.yml
+++ b/jenkins/client/job/salt-models/tests.yml
@@ -236,10 +236,10 @@
             - cookiecutter_template: cookiecutter-templates
           template:
             discard:
-             build:
-               keep_num: 50
-             artifact:
-               keep_num: 50
+              build:
+                keep_days: 4
+              artifact:
+                keep_days: 4
             type: workflow-scm
             concurrent: true
             scm:
@@ -371,9 +371,9 @@
           name: test-mk-cookiecutter-templates-chunk
           discard:
             build:
-              keep_num: 300
+              keep_days: 3
             artifact:
-              keep_num: 300
+              keep_days: 3
           type: workflow-scm
           concurrent: true
           plugin_properties: