Integrate SAP Hana as supported Spring Batch database

This commit adds SAP HANA as a supported Spring Batch database, enabling
developers to seamlessly move their existing Spring Batch projects to SAP HANA
or easily starting new Spring Batch projects on SAP HANA.

This commit contains the following changes:

- Add SAP HANA to the DatabaseType enum
- Add HanaPagingQueryProvider and tests
- Add properties files for SAP HANA

Issue #2515

spring-batch-samples/src/main/sql/hana.properties

@@ -0,0 +1,12 @@
+platform=hana
+# SQL language oddities
+BIGINT = BIGINT
+IDENTITY = 
+GENERATED = GENERATED BY DEFAULT AS IDENTITY
+DOUBLE = DOUBLE
+DECIMAL = DECIMAL
+BLOB = BLOB
+TIMESTAMP = TIMESTAMP
+VARCHAR = VARCHAR
+# for generating drop statements...
+SEQUENCE = SEQUENCE

spring-batch-samples/src/main/sql/hana.vpp

@@ -0,0 +1,2 @@
+#macro (sequence $name $value)CREATE SEQUENCE ${name} START WITH ${value} MINVALUE 0;
+#end