HPCC-11583 Allow user to change own password

Previously user had to be admin to change own password.

Fixes HPCC-11583

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #6019 from GordonSmith/HPCC-11583

HPCC-11583 Allow user to change own password

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>