Fix Kitchen tests

	- Fix Readme
	- Add '| yaml' filter
	- Update server schema

Related: PROD-22641 (PROD:22641)
Fixes: PROD-25919 (PROD:25919)

Change-Id: I016ef6aac6712e9feef6a6ece810d5f48b799bd7
diff --git a/tests/pillar/server_single.sls b/tests/pillar/server_single.sls
index 8fba554..1cf9015 100644
--- a/tests/pillar/server_single.sls
+++ b/tests/pillar/server_single.sls
@@ -1,3 +1,3 @@
 keycloak:
   server:
-    enabled: true
+    enabled: true
\ No newline at end of file