Doc building: Silence automated_steps

The logs of docs for this repo are really large, silence a small part: The
logging of automated steps debug output.

Change-Id: I3f7991a79bf89f04932bb4501c3f39d0317414e5

doc/source/_exts/automated_steps.py

@@ -30,6 +30,8 @@ from ironic.common import driver_factory
 
 LOG = logging.getLogger(__name__)
 
+# Enable this locally if you need debugging output
+DEBUG = False
 
 def _list_table(add, headers, data, title='', columns=None):
     """Build a list-table directive.
@@ -85,6 +87,7 @@ def _init_steps_by_driver():
     # the methods of the class.
 
     for interface_name in sorted(driver_factory.driver_base.ALL_INTERFACES):
+        if DEBUG:
             LOG.info('[{}] probing available plugins for interface {}'.format(
                 __name__, interface_name))
 
@@ -110,6 +113,7 @@ def _init_steps_by_driver():
                     'interface': interface_name,
                     'doc': _format_doc(inspect.getdoc(method)),
                 }
+                if DEBUG:
                     LOG.info('[{}] interface {!r} driver {!r} STEP {}'.format(
                         __name__, interface_name, plugin.name, step))
                 steps.append(step)