Make publish_collection more universal

With this change we replace zuul.projects with zuul.project that will
imply any project which will run the job. Also we read galaxy.yml as
vars file to predict packed collection naming for futher upload.

Change-Id: I66e27f3026689ad719384203fe66d65f5bca46ce
Needed-By: https://review.opendev.org/c/openstack/ansible-config_template/+/846391
(cherry picked from commit 8f27184f30)

ci/publish/publish_collection.yml

@@ -1,7 +1,7 @@
 ---
 - hosts: all
   vars:
-    collection_path: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/ansible-collections-openstack'].src_dir }}"
+    collection_path: "{{ ansible_user_dir }}/{{ zuul.project.src_dir }}"
     build_collection_path: /tmp/collection_built/
     ansible_galaxy_path: "~/.local/bin/ansible-galaxy"
 
@@ -63,12 +63,15 @@
               url = {{ ansible_galaxy_info.url }}
               token = {{ ansible_galaxy_info.token }}
 
+        - name: Include galaxy.yml as vars file
+          include_vars: "{{ collection_path }}/galaxy.yml"
+
         - name: Publish collection to Ansible Galaxy / Automation Hub
           environment:
             ANSIBLE_CONFIG: "{{ _ansiblecfg_tmp.path }}"
           shell: >-
             {{ ansible_galaxy_path }} collection publish -vvv
-            {{ build_collection_path }}/openstack-cloud-{{ version_tag }}.tar.gz
+            {{ build_collection_path }}/{{ namespace }}-{{ name }}-{{ version_tag }}.tar.gz
 
       always:
         - name: Shred ansible-galaxy credentials