Recreating required files for `files` folder

Commit [1] removed the `files` directory for both openstack-helm and
openstack-helm-infra folders, as they were not used by the Debian build
system. However, 3 files were incorrectly removed, causing issues when
running the downloader command.

This commit reintroduces these files, making sure the build for both
packages work.

[1] https://review.opendev.org/c/starlingx/openstack-armada-app/+/908177

Test Plan:
PASS - Successfully run downloader -s -b -B std,rt

Closes-Bug: 2052709

Change-Id: I4ee8d11b4c4fc78d570c4ef0f8a9d950dc748aa8
Signed-off-by: Lucas de Ataides <lucas.deataidesbarreto@windriver.com>

openstack-helm-infra/files/repositories.yaml

@@ -0,0 +1,12 @@
+---
+apiVersion: v1
+generated: 2019-01-02T15:19:36.215111369-06:00
+repositories:
+  - caFile: ""
+    cache: /builddir/.helm/repository/cache/local-index.yaml
+    certFile: ""
+    keyFile: ""
+    name: local
+    password: ""
+    url: http://127.0.0.1:8879/charts
+    username: ""

openstack-helm/files/index.yaml

@@ -0,0 +1,4 @@
+---
+apiVersion: v1
+entries: {}
+generated: 2019-01-07T12:33:46.098166523-06:00

openstack-helm/files/repositories.yaml

@@ -0,0 +1,12 @@
+---
+apiVersion: v1
+generated: 2019-01-02T15:19:36.215111369-06:00
+repositories:
+  - caFile: ""
+    cache: /builddir/.helm/repository/cache/local-index.yaml
+    certFile: ""
+    keyFile: ""
+    name: local
+    password: ""
+    url: http://127.0.0.1:8879/charts
+    username: ""