ansible: minor playbook fixes to connect the local VM
ansible: minor playbook fixes to connect the local VM

- use the right name checking for local vm leftovers
- remove entries from known_hosts file
- wait before trying ssh connection

Change-Id: I609948a00cd504bb99badf173fd8962da9a910fa
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup