Add TickerService and API (dummy empty)

src/main/tjava/com/r35157/assetaz/core/service/ticker/TickerService.tjava

@@ -0,0 +1,4 @@
+package com.r35157.assetaz.core.service.ticker;
+
+public interface TickerService {
+}

src/main/tjava/com/r35157/assetaz/core/service/ticker/impl/ref/TickerServiceImpl.tjava

@@ -0,0 +1,6 @@
+package com.r35157.assetaz.core.service.ticker.impl.ref;
+
+import com.r35157.assetaz.core.service.ticker.TickerService;
+
+public class TickerServiceImpl implements TickerService {
+}