Add log output for agent user permission check

Co-authored-by: Andreas Nygard <andreas.nygard@gmail.com>

Author: AndreBrinkop

src/main/java/org/jenkinsci/plugins/GithubRequireOrganizationMembershipACL.java

@@ -105,6 +105,7 @@ public boolean hasPermission(@NonNull Authentication a, @NonNull Permission perm
 
             // Grant agent permissions to agent user
             if (candidateName.equalsIgnoreCase(agentUserName) && checkAgentUserPermission(permission)) {
+                log.finest("Granting Agent Connect rights to user " + candidateName);
                 return true;
             }
 
@@ -161,6 +162,7 @@ else if (testBuildPermission(permission) && isInWhitelistedOrgs(authenticationTo
 
             // Grant agent permissions to agent user
             if (authenticatedUserName.equalsIgnoreCase(agentUserName) && checkAgentUserPermission(permission)) {
+                log.finest("Granting Agent Connect rights to user " + authenticatedUserName);
                 return true;
             }