Do formatting changes to make our current generator output match up more
with how it will be with oslo-config-generator. This will make it easier
to review what changes occur to the ironic.conf.sample file when moving
to the use of oslo-config-generator.
* Put spaces between variable and value. For example "foo = spam",
instead of "foo=spam". If value is empty string, don't have trailing
space after equal.
* When there are 'choices' change the wording to "Allowed values" from
"Possible values". Intentionally did not change any of the other
messages with the wording 'Possible.*'
* When min_value and max_value are both present, no longer use
'Possible values' anymore but output them separately instead.
* Change the value of OPT type to 'unknown value'.
* Change the output of deprecated_for_removal flag.
* Regenerate sample config.
Co-Authored-By: Lin Tan <lin.tan@intel.com>
Change-Id: I1bc8b00eb98055a6e0f06af287cfa10c02ee2094