Refactor EbeanServerFactory internals - use SpiContainerFactory interface and service loader

src/main/java/io/ebeaninternal/server/DContainerFactory.java

@@ -0,0 +1,17 @@
+package io.ebeaninternal.server;
+
+import io.ebean.config.ContainerConfig;
+import io.ebean.service.SpiContainer;
+import io.ebean.service.SpiContainerFactory;
+import io.ebeaninternal.server.core.DefaultContainer;
+
+/**
+ * Default container factory found via service loader.
+ */
+public class DContainerFactory implements SpiContainerFactory {
+
+  @Override
+  public SpiContainer create(ContainerConfig containerConfig) {
+    return new DefaultContainer(containerConfig);
+  }
+}