HPCC-8630 Configmr -  Add htpasswd Option to ESP Authentication

- Add htpasswdFile field
- Add htpasswd authentication method

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
HPCC-8630 Configmr - Add htpasswd Option to ESP Authentication

- Make default environment.xml htpasswd file location absolute

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
Merge pull request #3886 from garonsky/issue-8630_htpasswd_config_40

HPCC-8630 Configmr -  Add htpasswd Option to ESP Authentication

Reviewed-By: Russ Whitehead <william.whitehead@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>