Update '_run_command_over_ssh' to raise exceptions

[Yarboa]

Based on this patch
https://review.gerrithub.io/c/redhat-openstack/nfv-tempest-plugin/+/482715/7..34/nfv_tempest_plugin/tests/scenario/test_nfv_ovs_usecases.py#b82

the following call introduced
hypervisor_ssh.exec_command(bond.ifup_cmd) due to the options to through exceptions

current '_run_command_over_ssh' is not doing it.
We should wrap hypervisor_ssh.exec_command in _run_command_over_ssh

And raise Errors