fix(apply): merge rio namespace with incoming values

riocli creates a template namespace named rio that users can access in
their manifests to fetch rapyuta.io specific values like project id,
name, etc. However, if an incoming values file also has a rio attribute
then it leads to a conflict since the CLI doesn't merge them both.

This commit fixes the issue and merged both namespaces.

riocli/apply/parse.py

@@ -453,7 +453,7 @@ def _get_object_key(obj: dict) -> str:
     def _inject_rio_namespace(self, values: typing.Optional[dict] = None) -> dict:
         values = values or {}
 
-        values['rio'] = {
+        rio = {
             'project': {
                 'name': self.config.data.get('project_name'),
                 'guid': self.config.project_guid,
@@ -466,4 +466,9 @@ def _inject_rio_namespace(self, values: typing.Optional[dict] = None) -> dict:
             'email_id': self.config.data.get('email_id'),
         }
 
+        if 'rio' in values:
+            values['rio'].update(rio)
+        else:
+            values['rio'] = rio
+
         return values