Nexus role mapping

Summary

Nexus-Repository-Manager additional feature: This addition to Big Bang Nexus allows the user to add multiple roles when nexus is enable for the first time as an addon within Big Bang. addons.nexus.sso is required to be enabled An activate nexus license key is required

/cc @mike.knoth @grant.duncklee

chart/templates/nexus-repository-manager/values.yaml

@@ -47,13 +47,21 @@ sso:
     - "NexusAuthenticatingRealm"
     - "NexusAuthorizingRealm"
     - "SamlRealm"
-  role:
-    id: "keycloak"
-    name: "keycloak"
-    description: "all keycloak users as admins"
-    privileges:
-      - "nx-all"
-    roles:
-      - "nx-admin"
+  role: 
+    {{- range .Values.addons.nexus.sso.role }}
+    - id: {{ .id | quote }}
+      name: {{ .name | quote }}
+      description: {{ .description | quote }}
+      privileges: 
+        {{- range .privileges }}
+        - {{ . | quote }}
+        {{- else }} []
+        {{- end }}
+      roles: 
+        {{- range .roles }}
+        - {{ . | quote }}
+        {{- else }} []
+        {{- end }}
+    {{- end }}
 {{- end }}
 {{- end -}}