Rename openshift_hosted_logging_image_{prefix,version} to match metrics

roles/openshift_hosted_logging/vars/main.yaml

@@ -1,6 +1,6 @@
-tr_or_ohlip: "{{ openshift_hosted_logging_image_prefix or target_registry or none }}"
-ip_kv: "{{ '-p IMAGE_PREFIX=' ~ tr_or_ohlip | quote if tr_or_ohlip is defined else '' }}"
-iv_kv: "{{ '-p IMAGE_VERSION=' ~ openshift_hosted_logging_image_version | quote if openshift_hosted_logging_image_version is defined else '' }}"
+tr_or_ohlip: "{{ openshift_hosted_logging_deployer_prefix | default(target_registry) | default(None) }}"
+ip_kv: "{{ '-p IMAGE_PREFIX=' ~ tr_or_ohlip | quote if tr_or_ohlip != '' else '' }}"
+iv_kv: "{{ '-p IMAGE_VERSION=' ~ openshift_hosted_logging_deployer_version | quote if openshift_hosted_logging_deployer_version is defined else '' }}"
 oc_new_app_values: "{{ ip_kv }} {{ iv_kv }}"
 openshift_master_config_dir: "{{ openshift.common.config_base }}/master"
 kh_cmap_param: "{{ '--from-literal kibana-hostname=' ~ openshift_hosted_logging_hostname | quote if openshift_hosted_logging_hostname is defined else '' }}"