Rename 'remove' to 'reset' in Quota API

The name of the remove_quota API call is misleading.
The real purpose of this call is to reset the quota
to its default value, not to remove it.

This patch is limited to the title of the call in v2,
and it does not modify the REST API in any way.

Task: 5868
Story: 2001295

Change-Id: Idfb1f3c3fe90d71434d0bb6a973e146ea3dea67c

api-ref/source/v2/quota.inc

@@ -241,8 +241,8 @@ Response Example
 .. literalinclude:: examples/quota-update-response.json
    :language: javascript
 
-Remove a Quota
-==============
+Reset a Quota
+=============
 
 .. rest_method:: DELETE /v2.0/lbaas/quotas/{project_id}
 
@@ -271,7 +271,7 @@ Request
 Curl Example
 ------------
 
-.. literalinclude:: examples/quota-delete-curl
+.. literalinclude:: examples/quota-reset-curl
    :language: bash
 
 Response

octavia/policies/quota.py

@@ -49,7 +49,7 @@ rules = [
         '{rbac_obj}{action}'.format(rbac_obj=constants.RBAC_QUOTA,
                                     action=constants.RBAC_DELETE),
         constants.RULE_API_WRITE_QUOTA,
-        "Remove a Quota",
+        "Reset a Quota",
         [{'method': 'DELETE',
           'path': '/v2.0/lbaas/quotas/{project_id}'}]
     ),