Add support for Postgres range partition DDL plus refactor xsd definitions that had got out of sync (#1465)

* Add partition meta mapping

* Fix to allow schema prefix on select dynamic formula

* Add partition meta mapping

* Migration XSD Update

* Fix to allow schema prefix on select dynamic formula

* Bump ebean-migration to 11.8.1

src/main/java/io/ebeaninternal/server/deploy/PartitionMeta.java

@@ -0,0 +1,27 @@
+package io.ebeaninternal.server.deploy;
+
+import io.ebean.annotation.PartitionMode;
+
+public class PartitionMeta {
+
+  private final PartitionMode mode;
+
+  private String property;
+
+  public PartitionMeta(PartitionMode mode, String property) {
+    this.mode = mode;
+    this.property = property;
+  }
+
+  public PartitionMode getMode() {
+    return mode;
+  }
+
+  public String getProperty() {
+    return property;
+  }
+
+  public void setProperty(String dbColumn) {
+    this.property = dbColumn;
+  }
+}