Fix /healthcheck url typo in glance-api-paste

Change-Id: I3350fd45adbd5ba878ca588d28cb0057fc1465e9
(cherry picked from commit 629ea06)

Author: sorrison

etc/glance-api-paste.ini

@@ -32,7 +32,7 @@ paste.composite_factory = glance.api:root_app_factory
 [composite:glance-api-keystone+cachemanagement]
 paste.composite_factory = glance.api:root_app_factory
 /: api
-/healthchetck: healthcheck
+/healthcheck: healthcheck
 
 [composite:api]
 paste.composite_factory = glance.api:pipeline_factory