Kqueen default variables refactoring

-  Move env-vars on stack level to create env-dile and to avoid

```api.environment.VAR must be a string, number or null```
- Change default value for haproxy API port to avoid isses with
port duplicates (docker registry)

related-bug: https://mirantis.jira.com/browse/PROD-19571

Change-Id: Ic4154614c26b361c0621aa8e188c6d872d30ff0b
diff --git a/.releasenotes/notes/kqueen-port-change-8b34593966336e27.yaml b/.releasenotes/notes/kqueen-port-change-8b34593966336e27.yaml
new file mode 100644
index 0000000..1021b5e
--- /dev/null
+++ b/.releasenotes/notes/kqueen-port-change-8b34593966336e27.yaml
@@ -0,0 +1,14 @@
+---
+
+summary: >
+  Changed default port for KQueen API service.
+
+upgrades:
+
+  .. code-block:: yaml
+
+     -    haproxy_kqueen_api_exposed_port: 15000
+     +    haproxy_kqueen_api_exposed_port: 15001
+
+fixes:
+  - https://mirantis.jira.com/browse/PROD-19571