Fix embedded test case for multiple hosts

Author: rozza

driver-embedded/src/main/com/mongodb/embedded/client/MongoClientSettings.java

@@ -120,7 +120,7 @@ public Builder applyConnectionString(final ConnectionString connectionString) {
                             connectionString.getHosts().get(0)));
                 }
             } else {
-                throw new MongoClientException(format("Connection String contains invalid hosts: %s", connectionString.getHosts()));
+                throw new MongoClientEmbeddedException(format("Connection String contains invalid hosts: %s", connectionString.getHosts()));
             }
             return this;
         }