Move commit exception handling to a method so we can override

It looks like these methods all get included into the AbstractAdapter,
and then in github/github we have our own Adapter as an internal gem.

So this should be easy enough to override in our vendor'ed adapter.

This will allow us to still grab errors that happen in `after_commit`
which would normally be swallowed in Rails 3.0 (and beyond).

Conflicts:
	activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -371,7 +371,7 @@ module ActiveRecord
               begin
                 record.committed!
               rescue Exception => e
-                record.logger.error(e) if record.respond_to?(:logger) && record.logger
+                handle_commit_exceptions(record, e)
               end
             end
           end
@@ -385,6 +385,11 @@ module ActiveRecord
         row = result.rows.first
         row && row.first
       end
+
+      # Handle any exceptions caught trying to send the commit message to a record
+      def handle_commit_exceptions(record, e)
+        record.logger.error(e) if record.respond_to?(:logger) && record.logger
+      end
     end
   end
 end