Update htk requirements repo

As part of the move to helm v3, all the charts in the OSH repos
will no longer lint/build properly due to a lack of helm serve
in helm v3.

This change modifies the helm-toolkit repo location to the
osh-infra repo in order to account for the removal oh helm serve.

This work is part of the migration to helm v3 and will be utilized
in future changes.

Change-Id: I90d25943d69ad6c76455f7778a4894f00c525c46

aodh/Chart.yaml

@@ -16,7 +16,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: Openstack-Helm Aodh
 name: aodh
-version: 0.2.1
+version: 0.2.2
 home: https://docs.openstack.org/aodh/latest/
 sources:
   - https://opendev.org/openstack/aodh

aodh/requirements.yaml

@@ -14,5 +14,5 @@
 
 dependencies:
   - name: helm-toolkit
-    repository: http://localhost:8879/charts
+    repository: file://../../openstack-helm-infra/helm-toolkit
     version: ">= 0.1.0"