Add support for policy definition consumer-timeout as a integer

[Turgon37]

In a way analog to #557, can we add support for new consumer-timeout policy definition according to documentation https://rabbitmq.com/consumers.html#acknowledgement-timeout

How to reproduce (e.g Puppet code you use)

rabbitmq_policy { 'longtimeout':
    pattern  => 'train_learning_version'
    applyto => 'queues'
    definition:
      consumer-timeout: '86400000'

What are you seeing

Error: Execution of '/usr/sbin/rabbitmqctl set_policy -p bot01 --priority 20 --apply-to queues longtimeout train_learning_version {"consumer-timeout":"86400000"}' returned 69: Setting policy "longtimeout" for pattern "train_learning_version" to "{"consumer-timeout":"86400000"}" with priority "20" for vhost "bot01" ...
Error:
Validation failed
<<"86400000">> is not a valid consumer timeout

What behaviour did you expect instead

Notice: /Stage[main]/Rabbitmq_policy[longtimeout]/ensure: created

Output log

Any additional information you'd like to impart

If I type it using integer format it works

[DC01] root@ai-broker01-u01.dc01 ~ # /usr/sbin/rabbitmqctl set_policy -p bot01 --priority 20 --apply-to queues queues-federation-with-long-timeout-for-dc02 train_learning_version '{"federation-upstream":"federation-to-ai-broker01-uat-dc02-bot01","consumer-timeout":86400000}'
Setting policy "longtimeout" for pattern "train_learning_version" to "{"consumer-timeout":86400000}" with priority "20" for vhost "bot01" ...