HPCC-10312 Disable Security Tab if user is not Admin

Disable SetBanner
Suppress Security Error Message on initial load

Fixes HPCC-10312
Fixes HPCC-11591

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #6026 from GordonSmith/HPCC-11591_10312

HPCC-10312 Disable Security Tab if user is not Admin

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>