Fix requirements build for master

The requirements.sh script fails on master due to this
https://review.opendev.org/c/openstack/requirements/+/921656

Also Ansible docker_container module is not compatible
with the recent docker daemon.

Change-Id: Ib9440cbf2a5196c31a7669edd73472d685a754a5

playbooks/setup-gate.yaml

@@ -12,16 +12,8 @@
       block:
         - include_role:
             name: ensure-docker
-        - pip:
+        - shell: |
-            name:
+            docker run -d --name registry --restart always -p 172.17.0.1:5000:5000 docker.io/registry:2
-            - docker
-        - docker_container:
-            name: registry
-            image: registry:2
-            state: started
-            restart_policy: "always"
-            published_ports:
-              - 172.17.0.1:5000:5000
       become: True
 
     - name: Setup http server for git repos
@@ -49,4 +41,5 @@
             name:
               - apache2
               - gitweb
+              - python3-requests
       become: True

scripts/requirements.sh

@@ -33,12 +33,13 @@ if [[ "$(uname -p)" == "aarch64" ]]; then
 fi
 
 # Remove any pylxd before 2.2.7 as the old versions cannot be built in CI.
-lxd_constraint=$(grep pylxd /upper-constraints.txt)
+if lxd_constraint=$(grep pylxd /upper-constraints.txt); then
     # This removes (##) everything (*) from the lxd_constraint until the last =,
     # and removes all '.' to look like a number.
     if (( $(echo ${lxd_constraint##*=} | sed 's#\.##g') < 227 )); then
         sed -i '/pylxd/d' /upper-constraints.txt
     fi
+fi
 
 mkdir /source-wheels
 # Pre-build wheels for unnamed constraints