Description of problem:

When setting up iSCSI on Hosted Engine Deployment, frontend logic doesn't send 'Port' value to the server, causing a python exception.

Version-Release number of selected component (if applicable):

I don't know how to check cockpit version. I installed the server recently via the ovirt cockpit repo so I assume latest. Maybe this should be made more obvious - I can't figure out how to check. 

How reproducible:

I can't complete an iSCSI install at all, so very.

Steps to Reproduce:
1. Create a Hosted Engine Deployment
2. Attempt to deploy via iSCSI
3. No bueno

Actual results:

No bueno

Expected results:

iSCSI to work

Additional info:

I've traced the websocket request as follows:

3:4!294
he_filtered_tokens_vars: ['ADMIN_PASSWORD','APPLIANCE_PASSWORD','ISCSI_PASSWORD','ISCSI_DISCOVER_PASSWORD','ROOTPWD','he_appliance_password','he_admin_password','he_iscsi_password','he_iscsi_discover_password','ansible_ssh_pass']
he_filtered_tokens_re: ['BEGIN PRIVATE KEY(?P<filter>.*)END PRIVATE KEY']
he_iscsi_discover_username: test
he_iscsi_portal_addr: 10.0.0.4
he_iscsi_portal_port: 
he_fqdn: foo.bar.com
he_host_name: m1.foo.bar.com

Note the port is blank. 

In ovirt-hosted-engine-setup-ansible-iscsi_discover-20210922205908-bwmaim.log:

ERROR ansible failed {
    "ansible_host": "localhost",
    "ansible_playbook": "/usr/share/ovirt-hosted-engine-setup/ansible/trigger_role.yml",
    "ansible_result": {
        "_ansible_no_log": false,
        "changed": false,
        "exception": "Traceback (most recent call last):\n  File \"/tmp/ansible_ovirt_host_payload_kyy78p57/ansible_ovirt_host_payload.zip/ansible_collections/ovirt/ovirt/plugins/modules/ovirt_host.py\", line 618, in main\nTypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'\n",

Within ovir_host.py, Line 618 is:

                    port=int(iscsi_param.get('port', 3260)),

Interestingly, I would assume that line on its own would default to 3260, but apparently it's not, so this may actually be two separate bugs. 


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