Add nfs dependencies to glance container

Glance API image lacked nfs programs/utils to be able to mount
NFS exports.
This affected Glance usage with Cinder backend when NFS was used
as Cinder backend.

Closes-Bug: #1868574

Change-Id: I3aac1e6a7f7c5f839b036f15713af949fba206cc
(cherry picked from commit cac9d46)

Author: rajathere

docker/glance/glance-api/Dockerfile.j2

@@ -6,11 +6,14 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 {% import "macros.j2" as macros with context %}
 
 {% if base_distro in ['centos', 'oraclelinux'] %}
-    {% set glance_api_packages = ['qemu-img-ev'] %}
+    {% set glance_api_packages = ['nfs-utils', 'qemu-img-ev'] %}
 {% elif base_distro == 'rhel' %}
-    {% set glance_api_packages = ['qemu-img'] %}
+    {% set glance_api_packages = ['nfs-utils', 'qemu-img'] %}
 {% elif base_package_type == 'deb' %}
-    {% set glance_api_packages = ['qemu-utils'] %}
+    {% set glance_api_packages = [
+        'nfs-common',
+        'qemu-utils'
+    ] %}
 {% endif %}
 
 {{ macros.install_packages(glance_api_packages | customizable("packages")) }}

releasenotes/notes/bug-1868574.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes Glance inability to use Cinder NFS backend for images by including
+    NFS client components in the Glance API image.
+    `LP#1868574 <https://launchpad.net/bugs/1868574>`__