Adds support for additional Heat configurations

Saves all parts with content type "text/x-cfninitdata"
in the directory defined in the "heat_config_dir" option.

cloudbaseinit/plugins/windows/userdataplugins/heat.py

@@ -13,10 +13,21 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import os
+
+from cloudbaseinit.openstack.common import cfg
 from cloudbaseinit.openstack.common import log as logging
 from cloudbaseinit.plugins.windows.userdataplugins import base
 from cloudbaseinit.plugins.windows import userdatautils
 
+opts = [
+    cfg.StrOpt('heat_config_dir', default='C:\\cfn', help='The directory '
+               'where the Heat configuration files must be saved'),
+]
+
+CONF = cfg.CONF
+CONF.register_opts(opts)
+
 LOG = logging.getLogger(__name__)
 
 
@@ -26,8 +37,16 @@ class HeatPlugin(base.BaseUserDataPlugin):
     def __init__(self):
         super(HeatPlugin, self).__init__("text/x-cfninitdata")
 
+    def _check_heat_config_dir(self):
+        if not os.path.exists(CONF.heat_config_dir):
+            os.makedirs(CONF.heat_config_dir)
+
     def process(self, part):
+        self._check_heat_config_dir()
+
+        file_name = os.path.join(CONF.heat_config_dir, part.get_filename())
+        with open(file_name, 'wb') as f:
+            f.write(part.get_payload())
+
         if part.get_filename() == self._heat_user_data_filename:
             return userdatautils.execute_user_data_script(part.get_payload())
-        else:
-            LOG.info("Heat content not supported: %s" % part.get_filename())