Vendor middleware_automation.keycloak collection

Needed for keycloak_authentication_v2, to manage Keycloak
authentication flows (e.g. the CCCHH browser flow) as YAML.
Chosen over community.general's own copy of the module (deprecated in
favor of this collection, and limited to 4 sub-flow levels there vs.
10 here).

ansible_collections/middleware_automation/keycloak/requirements.yml

@@ -0,0 +1,15 @@
+---
+collections:
+  - name: middleware_automation.common
+    version: ">=1.2.4"
+  - name: middleware_automation.infinispan
+  - name: community.general
+  - name: ansible.posix
+  - name: community.docker
+    version: ">=3.8.0"
+  - name: containers.podman
+    version: ">=1.8.1"
+
+roles:
+  - name: elan.simple_nginx_reverse_proxy
+    version: "0.2.1"