Yugabyte platform support - Automatic detection and DDL support

- Automatic detection similar to Cockroach
- DDL very similar to Postgres but no CREATE TABLE LIKE support (for history DDL)

ebean-test/src/test/resources/ebean.properties

@@ -23,6 +23,7 @@ ebean.ddl.run=true
 ebean.ddl.header=-- Generated by ebean ${version} at ${timestamp}
 ebean.packages=org.tests,org.etest
 datasource.default=h2
+#datasource.default=yugabyte
 #datasource.h2.capturestacktrace=true
 
 #ebean.dumpMetricsOnShutdown=true
@@ -144,6 +145,10 @@ datasource.cockroach.password=
 datasource.cockroach.url=jdbc:postgresql://localhost:26257/unit?sslmode=disable
 datasource.cockroach.driver=org.postgresql.Driver
 
+datasource.yugabyte.username=unit
+datasource.yugabyte.password=test
+datasource.yugabyte.url=jdbc:postgresql://localhost:6433/unit?sslmode=disable
+
 datasource.oracle.username=test_ebean
 datasource.oracle.password=test
 datasource.oracle.url=jdbc:oracle:thin:@localhost:1521:XE