Only create Solr core when needed

If we need to re-run the configure_new_box role, we don't want
it to fail because the required solr core has already been created.

This commit checks existing cores and skips creating a new core if
it sees an existing core with the expected project name.

roles/configure_new_box/tasks/main.yml

@@ -75,13 +75,20 @@
       - configure
   # block end - configure Fedora
 
+- name: check for existing solr core
+  ansible.builtin.uri:
+    url: http://localhost:8983/solr/admin/cores?action=STATUS&indexInfo=false&core={{ project_name }}
+    body_format: json
+  register: t3_core
+
 - name: create default solr collection
   become: yes
   become_user: solr
   shell: /opt/solr/bin/solr create -c {{ project_name }} -d _default -p {{ solr_port }} creates=/var/solr/data/{{ project_name }}
   tags:
     - solr
     - configure
+  when: "'name' not in t3_core['json']['status']['t3']"
 
 - name: create directories needed for capistrano
   become: yes