Fixes #34889 - host collection update correctly handles unlimited-host

[parthaa]

What are the changes introduced in this pull request?

The host collection update call was not updating the unlimited_hosts attribute to false if max_hosts param was provided.

This PR fixes that and works in conjunction with -> Katello/hammer-cli-katello#846

What are the testing steps for this pull request?

• Checkout Refs #34889 - Makes host collection update --unlimited-hosts a flag hammer-cli-katello#846
• Keep katello at master
• Try the following commands

$ hammer host-collection create --name=great --organization-id=1  --unlimited-hosts
$ hammer host-collection info --name=great --organization-id=1 | grep Limit
Limit:       None

$ hammer  host-collection update --name=great --max-hosts=100 --organization-id=1
Host collection updated.

$ hammer host-collection info --name=great --organization-id=1 |grep Limit
Limit:       None

• No change in the Limit even though we set Max hosts param.
• Checkout the PR
• Try

$ hammer  host-collection update --name=great --max-hosts=100 --organization-id=1
Host collection updated.

$ hammer host-collection info --name=great --organization-id=1 |grep Limit
Limit:       100

[theforeman-bot]

Issues: #34889

[chris1984]

ACK, works great