Pass recursive=true into config.getNames() JGit method

This change solves the SSH aliasing. Without the parameters,
section content is not found.

Change-Id: I83acb53b8e919ea8cdd634eca1b66b04e6ef3107

gerrit-sshd/src/main/java/com/google/gerrit/sshd/SshModule.java

@@ -53,7 +53,7 @@ public class SshModule extends FactoryModule {
   @Inject
   SshModule(@GerritServerConfig Config cfg) {
     aliases = Maps.newHashMap();
-    for (String name : cfg.getNames("ssh-alias")) {
+    for (String name : cfg.getNames("ssh-alias", true)) {
       aliases.put(name, cfg.getString("ssh-alias", null, name));
     }
   }