Fix host verification error in CI

.gitlab-ci.yml

@@ -14,6 +14,7 @@ variables:
   SUBDOMAIN: "ci-${CI_PIPELINE_ID}.ci"
   DOMAIN: "openappstack.net"
   ADDRESS: "ci-${CI_PIPELINE_ID}.ci.openappstack.net"
+  ANSIBLE_HOST_KEY_CHECKING: "False"
 
 ci_test_image:
   stage: build
@@ -42,8 +43,6 @@ bootstrap:
     - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
     - echo "hostname $HOSTNAME, subdomain $SUBDOMAIN, domain $DOMAIN, address $ADDRESS"
     - python3 -m openappstack $HOSTNAME create --create-droplet $DOMAIN --hostname $HOSTNAME --ssh-key-id $SSH_KEY_ID --create-domain-records --subdomain $SUBDOMAIN
-    - export ANSIBLE_HOST_KEY_CHECKING=False
-    - mkdir -p ~/.ssh/ && echo ssh-keyscan -t ssh-ed25519 "$ADDRESS" > ~/.ssh/known_hosts
     - python3 -m openappstack $HOSTNAME install --ansible-param='--skip-tags=helmfile'
   artifacts:
     paths:
@@ -69,7 +68,6 @@ install:
     - chmod 755 ansible/
     - eval $(ssh-agent -s)
     - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
-    - mkdir -p ~/.ssh/ && echo ssh-keyscan -t ssh-ed25519 "$ADDRESS" > ~/.ssh/known_hosts
     - python3 -m openappstack $HOSTNAME install --ansible-param='--tags=helmfile'
     # Show versions of installed apps/binaries
     - ansible master -m shell -a 'oas-version-info.sh 2>&1'
@@ -92,7 +90,6 @@ testinfra:
     - eval $(ssh-agent -s)
     - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
     - cd ansible/
-    - mkdir -p ~/.ssh/ && echo ssh-keyscan -t ssh-ed25519 "$ADDRESS" > ~/.ssh/known_hosts
     - pytest -v -m 'testinfra' --connection=ansible --ansible-inventory=../clusters/$HOSTNAME/inventory.yml --hosts='ansible://*'
   only:
     changes:
@@ -112,7 +109,6 @@ certs:
     - eval $(ssh-agent -s)
     - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
     - cd ansible/
-    - mkdir -p ~/.ssh/ && echo ssh-keyscan -t ssh-ed25519 "$ADDRESS" > ~/.ssh/known_hosts
     - pytest -s -m 'certs' --connection=ansible --ansible-inventory=../clusters/$HOSTNAME/inventory.yml --hosts='ansible://*'
   only:
     changes: