Hashicorp: Cache variables claim to be dynamic but changes are ignored

# The test presumes that the local vault is running at $VAULT_ADDR,

# and the token is configured in $VAULT_TOKEN

 --exec vault secrets disable bug

--exec vault secrets enable -path /bug -version=2 kv

--exec vault kv put /bug/1 data=0123456789012345678901234567890A > /dev/null

--let $restart_parameters= --plugin-load-add=hashicorp_key_management --hashicorp-key-management-vault-url="$VAULT_ADDR/v1/bug/" --hashicorp-key-management-token="$VAULT_TOKEN"

--source include/restart_mysqld.inc

SELECT

  @@HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT,

  @@HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT;

SET GLOBAL

  HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT= 1,

  HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT= 1;

SELECT

  @@HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT,

  @@HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT;

@@HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT	@@HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT

0	60000

SET GLOBAL

HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT= 1,

HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT= 1;

SELECT

@@HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT,

@@HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT;

@@HASHICORP_KEY_MANAGEMENT_CACHE_VERSION_TIMEOUT	@@HASHICORP_KEY_MANAGEMENT_CACHE_TIMEOUT

0	60000