HPCC-11113 Set public key permission to 600
Merge pull request #5743 from xwang2713/HPCC_11113_public_key_permission

HPCC-11113 Set public key permission to 600

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>