Add ability to place glance-image-import.conf

New config file glance-image-import.conf was introduced for a while
and it provides ability to customize image upload process.
As it's optional file, we don't distribute it by default, but only when
it's path to config file is set.

Change-Id: I437647aff026a460e6e5f8b73827e31631fd8d42

defaults/main.yml

@@ -305,3 +305,6 @@ glance_glance_scheme_json_overrides: {}
 glance_glance_swift_store_conf_overrides: {}
 glance_policy_overrides: {}
 glance_api_uwsgi_ini_overrides: {}
+
+# Specify path on the local filesystem for glance-image-import.conf
+#glance_glance_image_import_conf_location: /path/to/local/glance-image-import.conf

tasks/glance_post_install.yml

@@ -57,6 +57,15 @@
     - Manage LB
     - Restart glance services
 
+- name: Deploy Glance image import configuration file
+  template:
+    src: "{{ glance_glance_image_import_conf_location }}"
+    dest: "{{ glance_etc_dir }}/glance-image-import.conf"
+  when: glance_glance_image_import_conf_location is defined
+  notify:
+    - Manage LB
+    - Restart glance services
+
 # NOTE(cloudnull): This is using "cp" instead of copy with a remote_source
 #                  because we only want to copy the original files once. and we
 #                  don't want to need multiple tasks.