set defaults for debug_level in template and task

roles/openshift_master/templates/atomic-openshift-master.j2

@@ -1,4 +1,4 @@
-OPTIONS=--loglevel={{ openshift.master.debug_level }}
+OPTIONS=--loglevel={{ openshift.master.debug_level | default(2) }}
 CONFIG_FILE={{ openshift_master_config_file }}
 {% if openshift.common.is_containerized | bool %}
 IMAGE_VERSION={{ openshift_image_tag }}

roles/openshift_node/tasks/systemd_units.yml

@@ -40,7 +40,7 @@
     create: true
   with_items:
     - regex: '^OPTIONS='
-      line: "OPTIONS=--loglevel={{ openshift.node.debug_level }}"
+      line: "OPTIONS=--loglevel={{ openshift.node.debug_level | default(2) }}"
     - regex: '^CONFIG_FILE='
       line: "CONFIG_FILE={{ openshift_node_config_file }}"
     - regex: '^IMAGE_VERSION='