Query Cache will not always be invalidated (#1717)

* provide failing test, that shows missing cache invalidation

* FIX: proper cache invalidation when dependent table will be modified

src/test/java/org/tests/model/basic/cache/ECacheChild.java

@@ -0,0 +1,52 @@
+package org.tests.model.basic.cache;
+
+import java.util.UUID;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+
+import io.ebean.annotation.Cache;
+
+@Entity
+@Cache(enableQueryCache = true)
+public class ECacheChild {
+
+  @Id
+  @GeneratedValue
+  protected UUID id;
+
+  @Size(max = 100)
+  private String name;
+
+  @NotNull
+  @ManyToOne
+  private ECacheRoot root;
+
+  public UUID getId() {
+    return id;
+  }
+
+  public void setId(UUID id) {
+    this.id = id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public ECacheRoot getRoot() {
+    return root;
+  }
+
+  public void setRoot(ECacheRoot root) {
+    this.root = root;
+  }
+}

src/test/java/org/tests/model/basic/cache/ECacheRoot.java

@@ -0,0 +1,38 @@
+package org.tests.model.basic.cache;
+
+import java.util.UUID;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.validation.constraints.Size;
+
+import io.ebean.annotation.Cache;
+
+@Entity
+@Cache(enableQueryCache = true)
+public class ECacheRoot {
+
+  @Id
+  @GeneratedValue
+  protected UUID id;
+
+  @Size(max = 100)
+  private String name;
+
+  public UUID getId() {
+    return id;
+  }
+
+  public void setId(UUID id) {
+    this.id = id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+}