[POLICY] Change API and PAP usernames

- change references of healthcheck to policyadmin regarding API and PAP auth
- add robot variables to accommodate the referred changes.

Issue-ID: POLICY-3815
Change-Id: I318b7f44d9e7f554d98d845abd80cc6512831b78
Signed-off-by: adheli.tavares <adheli.tavares@est.tech>
diff --git a/kubernetes/policy/components/policy-api/values.yaml b/kubernetes/policy/components/policy-api/values.yaml
index 26ed0a7..43ec1d7 100755
--- a/kubernetes/policy/components/policy-api/values.yaml
+++ b/kubernetes/policy/components/policy-api/values.yaml
@@ -93,7 +93,7 @@
     internalPort: 3306
 
 restServer:
-  user: healthcheck
+  user: policyadmin
   password: none
 
 # default number of instances