On master during the addition of a configuration parameter to set the
IPMI behaviour the ipmi driver_info option was also renamed.
This stable only chnage is a partial backport of the master chnage to
rename the driver_info filed without adding the config option.
Conflicts:
ironic/conf/ipmi.py
ironic/tests/unit/conductor/test_manager.py
Change-Id: Ie049bbaf45aeab54c1272d1d561c5a6ca00dc34a
Story: 2002977
Task: 22985
(cherry picked from commit d379357cad)