Check test_mode in ShutdownControlNodeReq

Change-Id: I7f5f0449c01cffb13328ec79a4aaeda46669affa
    Make the RND secret configurable in the DNS config file.
    Also take the named config directory, file name and log file as config parameters.
    Create the rndc file.

    Test cases to check the new config options.

Change-Id: Ia7a54134e03a20b033785a7e4a4762599b84949d
(cherry picked from commit 15b1f8887cbd69ac3068eb5a0fa9405ddccf797a)
Merge "Check test_mode in ShutdownControlNodeReq"
Merge "    Make the RND secret configurable in the DNS config file.     Also take the named config directory, file name and log file as config parameters.     Create the rndc file."