Fix License manager dual server role problem in Monitoring Console

[patrykw-splunk]

Description:

In C3 deployments, the License Manager incorrectly appears with an indexer role in the Monitoring Console because:

• License Manager has dual server roles: A Splunk License Manager instance reports both license_master and indexer in its server_roles array (it's a standalone Splunk instance by default)
• Insufficient filtering logic: The code in main.yml filtered peers by checking if indexer was in their server_roles, but didn't exclude instances that also have the license_master role

Fix Applied:

Modified line 94 in main.yml:
The added | rejectattr('content.server_roles', 'search', 'license_master') filter excludes any peer that has license_master in its server roles from being added to the indexer group in the Monitoring Console.

Impact:

This fix ensures that License Managers are correctly categorized only in the dmc_group_license_master group and not incorrectly added to the dmc_group_indexer group in the Monitoring Console configuration.