feat(gate): Add support for Redis SSL (#1295)

* feat(gate): Add support for Redis SSL

Follow Kork's existing pattern and check for presence of rediss in
the URI Scheme.

Gate doesn't initialise JedisPool() pool with parameters like Kork
so follow Gate conventions and use function to enable SSL.

* style(gate): fix indentation of redis ssl function

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

gate-web/src/main/groovy/com/netflix/spinnaker/gate/config/PostConnectionConfiguringJedisConnectionFactory.java

@@ -60,6 +60,10 @@ public PostConnectionConfiguringJedisConnectionFactory(
         setPassword(userInfo.get(1));
       }
     }
+
+    if (redisUri.getScheme().equals("rediss")) {
+      setUseSsl(true);
+    }
   }
 
   @Override