Fix accidental parsing of password

When clouds.yaml gets parsed by `env.rc`, the `yq` command
is accidentally parsing the contents of the password
variable.

Under most circumstances the password contents is detected
correctly as a string. This fixes failures when the
password is accidentally parseable as a yaml structure.

More info at:
https://mikefarah.gitbook.io/yq/operators/env-variable-operators

Author: JanGutter

templates/env.rc

@@ -115,7 +115,7 @@ else
     if [[ "$CAPO_PASSWORD" = "" || "$CAPO_PASSWORD" = "null" ]]; then
         CAPO_OPENSTACK_CLOUD_YAML_SELECTED_CLOUD_B64=$(echo "${CAPO_OPENSTACK_CLOUD_YAML_CONTENT}" | yq e .clouds.${CAPO_CLOUD} - | yq e '{"clouds": {"'${CAPO_CLOUD}'": . }}' - | b64encode)
     else
-        CAPO_OPENSTACK_CLOUD_YAML_SELECTED_CLOUD_B64=$(echo "${CAPO_OPENSTACK_CLOUD_YAML_CONTENT}" | yq e .clouds.${CAPO_CLOUD} - | PASSWORD=${CAPO_PASSWORD} yq e '.auth.password = env(PASSWORD)' - | yq e '{"clouds": {"'${CAPO_CLOUD}'": . }}' - | b64encode)
+        CAPO_OPENSTACK_CLOUD_YAML_SELECTED_CLOUD_B64=$(echo "${CAPO_OPENSTACK_CLOUD_YAML_CONTENT}" | yq e .clouds.${CAPO_CLOUD} - | PASSWORD=${CAPO_PASSWORD} yq e '.auth.password = strenv(PASSWORD)' - | yq e '{"clouds": {"'${CAPO_CLOUD}'": . }}' - | b64encode)
     fi
 fi
 export OPENSTACK_CLOUD_YAML_B64="${CAPO_OPENSTACK_CLOUD_YAML_SELECTED_CLOUD_B64}"