Fix rapid7#3951 Update Windows::Registry to use cmd_exec

Author: jvazquez-r7

lib/msf/core/post/windows/registry.rb

@@ -170,7 +170,7 @@ def shell_registry_cmd(suffix, view = REGISTRY_VIEW_NATIVE)
     elsif view == REGISTRY_VIEW_64_BIT
       cmd += " /reg:64"
     end
-    session.shell_command_token_win32("#{cmd} #{suffix}")
+    cmd_exec("#{cmd} #{suffix}")
   end
 
   def shell_registry_cmd_result(suffix, view = REGISTRY_VIEW_NATIVE)