Correct internal tracing server cert name

We have instructed zuul to connect to tracing.opendev.org, but
we are generating a certificate using opendev-ca with
S=tracing01.opendev.org.  Update the certificate with the correct
subject.

This also corrects the opendev-ca role which assumed that the cert
filename would always be inventory_hostname.

Change-Id: I9b6b0534f058d386e01910bb7efc30312f3d72ad

playbooks/roles/jaeger/tasks/main.yaml

@@ -37,6 +37,7 @@
     name: opendev-ca
   vars:
     opendev_ca_name: jaeger
+    opendev_ca_server: "tracing.opendev.org"
     opendev_ca_cert_dir: /var/jaeger/tls
     opendev_ca_cert_dir_owner: "{{ jaeger_user }}"
     opendev_ca_cert_dir_group: "{{ jaeger_group }}"

playbooks/roles/opendev-ca/tasks/main.yaml

@@ -35,15 +35,15 @@
 
 - name: Copy TLS cert into place
   copy:
-    src: "{{ opendev_ca_root }}/certs/{{ inventory_hostname }}.pem"
+    src: "{{ opendev_ca_root }}/certs/{{ opendev_ca_server }}.pem"
     dest: "{{ opendev_ca_cert_dir }}/certs/cert.pem"
 
 - name: Copy TLS key into place
   copy:
-    src: "{{ opendev_ca_root }}/keys/{{ inventory_hostname }}key.pem"
+    src: "{{ opendev_ca_root }}/keys/{{ opendev_ca_server }}key.pem"
     dest: "{{ opendev_ca_cert_dir }}/keys/key.pem"
 
 - name: Copy TLS keystore into place
   copy:
-    src: "{{ opendev_ca_root }}/keystores/{{ inventory_hostname }}.pem"
+    src: "{{ opendev_ca_root }}/keystores/{{ opendev_ca_server }}.pem"
     dest: "{{ opendev_ca_cert_dir }}/keys/keystore.pem"