Add new detail kwarg to show_quota_set to QuotasClient.

Currently, quotas_client.QuotasClient doesn't support the
'os-quota-sets/{tenant_id}/detail' endpoint [0] but is supported
by Nova [1].

Nova uses the policy 'os_compute_api:os-quota-sets:detail'
for the endpoint ending with /detail and
'os_compute_api:os-quota-sets:show' without the /detail uri [2].
This is needed by Patrole for complete test coverage for Nova.

This patch adds the kwarg to show_quota_set which calls the '/detail'
endpoint, if True. Also updated quotas schema with
get_quota_set_details, because each property in the response body
is of type object, not integer [1].

[0] https://github.com/openstack/tempest/blob/master/tempest/lib/services/compute/quotas_client.py
[1] https://developer.openstack.org/api-ref/compute/?expanded=show-the-detail-of-quota-detail#show-the-detail-of-quota
[2] https://github.com/openstack/nova/blob/master/nova/policies/quota_sets.py

Change-Id: I9a65411c6bf65bf20842719bffe46c7fa7db82eb
Closes-Bug: #1662593
diff --git a/releasenotes/notes/add-quota-sets-detail-kwarg-74b72183295b3ce7.yaml b/releasenotes/notes/add-quota-sets-detail-kwarg-74b72183295b3ce7.yaml
new file mode 100644
index 0000000..06f4fcd
--- /dev/null
+++ b/releasenotes/notes/add-quota-sets-detail-kwarg-74b72183295b3ce7.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Interface show_quota_set of compute quotas_client has been extended to include the
+    argument "detail", which allows for detailed quota set information for a project to be
+    retrieved, if set to True.