HDDS-11192. Increase SPNEGO URL test coverage

[adoroszlai]

What changes were proposed in this pull request?

Update existing Robot test for SPNEGO-enabled URLs to cover more endpoints (more servlets and more servers).

https://issues.apache.org/jira/browse/HDDS-11192

How was this patch tested?

Run in CI:

Verify SPNEGO URLs without auth                                       | PASS |
------------------------------------------------------------------------------
Verify SPNEGO URLs with auth                                          | PASS |

https://github.com/adoroszlai/ozone/actions/runs/9961163803/job/27522849505#step:5:997

$ grep -o 'curl.*http_code.*http://[^ ]*' ozonesecure.xml | wc -l
54

$ grep -o 'curl.*http_code.*http://[^ ]*' ozonesecure.xml | head 
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/conf'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/jmx'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/logLevel'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/logs/'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/prom'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://om:9874/stacks'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://recon:9888/conf'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://recon:9888/jmx'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://recon:9888/logLevel'
curl --negotiate -u : --silent -o /dev/null -w '%{http_code}' 'http://recon:9888/logs/'

[adoroszlai]

Thanks @jojochuang for the review.