Reclassify some debug log lines as info

These are really useful.

Change-Id: I60e04834b5c38b02cabb3fc24bebd41997dd332e
diff --git a/zuul/scheduler.py b/zuul/scheduler.py
index 14ca029..ea03664 100644
--- a/zuul/scheduler.py
+++ b/zuul/scheduler.py
@@ -544,7 +544,7 @@
         self.layout_lock.acquire()
         self.config = event.config
         try:
-            self.log.debug("Full reconfiguration beginning")
+            self.log.info("Full reconfiguration beginning")
             loader = configloader.ConfigLoader()
             abide = loader.loadConfig(
                 self.config.get('scheduler', 'tenant_config'),
@@ -555,14 +555,14 @@
             self.abide = abide
         finally:
             self.layout_lock.release()
-        self.log.debug("Full reconfiguration complete")
+        self.log.info("Full reconfiguration complete")
 
     def _doTenantReconfigureEvent(self, event):
         # This is called in the scheduler loop after another thread submits
         # a request
         self.layout_lock.acquire()
         try:
-            self.log.debug("Tenant reconfiguration beginning")
+            self.log.info("Tenant reconfiguration beginning")
             # If a change landed to a project, clear out the cached
             # config before reconfiguring.
             for project in event.projects:
@@ -579,7 +579,7 @@
             self.abide = abide
         finally:
             self.layout_lock.release()
-        self.log.debug("Tenant reconfiguration complete")
+        self.log.info("Tenant reconfiguration complete")
 
     def _reenqueueGetProject(self, tenant, item):
         project = item.change.project