Add config-flags option

As per the bug report, add config-flag paramiter to config.yaml to add desired
options to the DEFAULT section of manila.conf

Closes-Bug: #1952320
Change-Id: If1a314119c59212f4fb885ef9af411d1ab05b1e2

src/config.yaml

@@ -76,3 +76,10 @@ options:
     description: |
       A comma-separated list of nagios servicegroups. If left empty, the
       nagios_context will be used as the servicegroup
+  config-flags:
+    type: string
+    default: ""
+    description: |
+      Setting multiple arbitrary configuration variable for manila.conf file.
+      Any configuration paramiters is comma-separated.
+      Zero or one spaces are allows between tokens.

src/templates/mitaka/manila.conf

@@ -28,6 +28,10 @@ debug = {{ options.debug }}
 # Number of workers for OpenStack Share API service. (integer value)
 osapi_share_workers = {{ options.workers }}
 
+{% for key, value in options.user_config_flags.items() -%}
+{{ key }} = {{ value }}
+{% endfor -%}
+
 [cors]
 
 #
@@ -81,3 +85,4 @@ osapi_share_workers = {{ options.workers }}
 {% for line in options.computed_backend_lines_manila_conf %}
 {{ line }}
 {%- endfor %}
+

src/templates/pike/manila.conf

@@ -30,6 +30,10 @@ osapi_share_workers = {{ options.workers }}
 
 {% include "parts/section-transport-url" %}
 
+{% for key, value in options.user_config_flags.items() -%}
+{{ key }} = {{ value }}
+{% endfor -%}
+
 [oslo_concurrency]
 lock_path = /var/lib/manila
 
@@ -82,3 +86,4 @@ lock_path = /var/lib/manila
 {% for line in options.computed_backend_lines_manila_conf %}
 {{ line }}
 {%- endfor %}
+

src/templates/queens/manila.conf

@@ -30,9 +30,14 @@ osapi_share_workers = {{ options.workers }}
 
 {% include "parts/section-transport-url" %}
 
+{% for key, value in options.user_config_flags.items() -%}
+{{ key }} = {{ value }}
+{% endfor -%}
+
 [oslo_concurrency]
 lock_path = /var/lib/manila
 
+
 [cors]
 
 #
@@ -82,3 +87,4 @@ lock_path = /var/lib/manila
 {% for line in options.computed_backend_lines_manila_conf %}
 {{ line }}
 {%- endfor %}
+

src/templates/rocky/manila.conf

@@ -30,6 +30,10 @@ osapi_share_workers = {{ options.workers }}
 
 {% include "parts/section-transport-url" %}
 
+{% for key, value in options.user_config_flags.items() -%}
+{{ key }} = {{ value }}
+{% endfor -%}
+
 [oslo_concurrency]
 lock_path = /var/lib/manila
 
@@ -82,3 +86,4 @@ lock_path = /var/lib/manila
 {% for line in options.computed_backend_lines_manila_conf %}
 {{ line }}
 {%- endfor %}
+