CLOUDSTACK-7448 Fix test_delete_account and test_releaseIP

CLOUDSTACK-4840 changed test_data.py to make the lbrule publicport be 22,
instead of 2222. In doing so, this caused the following tests to fail, as they
hit a problem where they tried to use port 22 for both the lbrule and for other
purposes:
integration.smoke.test_network.TestDeleteAccount.test_delete_account
integration.smoke.test_network.TestReleaseIP.test_releaseIP

The reason the change appears to have been made was that in
test_lb_secondary_ip.py, despite setting up the load balancer using lbrule, the
tests then used the SSH port from natrule to try and access the VM. By changing
lbrule to use port 22 (the same as natrule) this avoided the problem.

This patch updates test_lb_secondary_ip.py to use the SSH port in lbrule where
necessary to access the VMs, and reverts the change to test_data.py