Add pypowervm helpers to the adapter
Add pypowervm helpers to the adapter

This change set adds common 'helpers' to the adapter.  This will enable
automated logging in case of failures with the adapter.  It will also
automatically retry in case of VIOS busy.

Change-Id: I9033e04f9ce694a0b573f221ab8415f5b5f778bf

stackforge/neutron-powervm,openstack/networking-powervm,stackforge/neutron-powervm,openstack/networking-powervm