osctld: always call ct.mount from RunConfiguration#mount

When Container#mount is not called, the class doesn't know that it is
mounted, which might lead to Container#unmount bailing.

Author: aither64

osctld/lib/osctld/container/run_configuration.rb

@@ -110,8 +110,8 @@ def rootfs
     def mount(force: false)
       return if !force && mounted
 
-      dataset.mount(recursive: true)
-      ct.mount if ct.dataset.name != dataset.name
+      ct.mount
+      dataset.mount(recursive: true) if ct.dataset.name != dataset.name
 
       self.mounted = true
     end