5e8f2e39d4
This change introduces optional boot mode get/set methods to driver management interface [1] [2] alongside existing get/set boot device calls. The management interface is called at deploy time to synchronize BM machine boot mode setting with Ironic node configuration whenever needed. Also, this change introduces common exception class to be eventually used by the drivers to communicate their runtime errors to Ironic code in a uniformed way. 1. http://eavesdrop.openstack.org/irclogs/%23openstack-ironic/%23openstack-ironic.2018-01-09.log.html#t2018-01-09T15:54:16 2. http://eavesdrop.openstack.org/irclogs/%23openstack-ironic/%23openstack-ironic.2018-05-11.log.html#t2018-05-11T12:47:12 Story: 1734131 Task: 10640 Change-Id: If3db6ab8d3fae35d17808a231b7eecf11cf58327