Update SDK to automatically pull runtime URL when a session starts

src/main/java/com/salesforce/einsteinbot/sdk/cache/InMemoryCache.java

@@ -17,15 +17,20 @@
  */
 public class InMemoryCache implements Cache {
 
-  private final com.google.common.cache.Cache<String, String> cache;
+  private final com.google.common.cache.Cache<String, Object> cache;
 
   public InMemoryCache(long ttlSeconds) {
     cache = CacheBuilder.newBuilder().expireAfterAccess(ttlSeconds, TimeUnit.SECONDS).build();
   }
 
   @Override
   public Optional<String> get(String key) {
-    String val = cache.getIfPresent(key);
+    String val = (String) cache.getIfPresent(key);
+    return Optional.ofNullable(val);
+  }
+
+  public Optional<Object> getObject(String key) {
+    Object val = cache.getIfPresent(key);
     return Optional.ofNullable(val);
   }
 
@@ -34,12 +39,20 @@ public void set(String key, String val) {
     cache.put(key, val);
   }
 
+  public void setObject(String key, Object val) {
+    cache.put(key, val);
+  }
+
   /**
    * This method does not respect the ttlSeconds parameter.
    */
   @Override
   public void set(String key, String val, long ttlSeconds) {
-    cache.put(key, val);
+    set(key, val);
+  }
+
+  public void setObject(String key, Object val, long ttlSeconds) {
+    setObject(key, val);
   }
 
   @Override

src/main/java/com/salesforce/einsteinbot/sdk/cache/RedisCache.java

@@ -25,7 +25,7 @@ public class RedisCache implements Cache {
   private static final Long DEFAULT_TTL_SECONDS = 259140L; // 2 days, 23 hours, 59 minutes
 
   private JedisPool jedisPool;
-  private long ttlSeconds;
+  private final long ttlSeconds;
 
   /**
    * This constructor will use the default ttl of 259,140 seconds and will assume standard Redis

src/main/java/com/salesforce/einsteinbot/sdk/client/BasicChatbotClient.java

@@ -30,9 +30,9 @@ BotResponse startChatSession(RequestConfig config,
       ExternalSessionId sessionId,
       BotSendMessageRequest requestEnvelope);
 
-  Status getHealthStatus();
+  Status getHealthStatus(RequestConfig config);
 
-  SupportedVersions getSupportedVersions();
+  SupportedVersions getSupportedVersions(RequestConfig config);
 
   /**
    * BasicClientFluentBuilder provides Fluent API to create Basic Chatbot Client.