Deprecate SQLFire support

SQLFire was announced [1] to be in EOL as of November 1st, 2014.
This commit marks SQL scripts for SQLFire as deprecated and
scheduled for removal in v5.

[1]: https://www.vmware.com/latam/products/pivotal-sqlfire.html

Resolves #815

spring-batch-core/src/main/resources/batch-sqlf.properties

@@ -1,5 +1,7 @@
 # Placeholders batch.*
 #    for SQLFire:
+# As of v4.3, SQLFire support is deprecated and scheduled for removal in v5.0
+
 batch.jdbc.driver=com.vmware.sqlfire.jdbc.ClientDriver
 batch.jdbc.url=jdbc:sqlfire://localhost:1257/;update=true
 batch.jdbc.user=SAMPLES

spring-batch-core/src/main/resources/org/springframework/batch/core/schema-drop-sqlf.sql

@@ -1,4 +1,5 @@
 -- Autogenerated: do not edit this file
+-- As of v4.3, SQLFire support is deprecated and scheduled for removal in v5.0
 
 DROP TABLE  IF EXISTS BATCH_STEP_EXECUTION_CONTEXT ;
 DROP TABLE  IF EXISTS BATCH_JOB_EXECUTION_CONTEXT ;

spring-batch-core/src/main/resources/org/springframework/batch/core/schema-sqlf.sql

@@ -1,4 +1,5 @@
 -- Autogenerated: do not edit this file
+-- As of v4.3, SQLFire support is deprecated and scheduled for removal in v5.0
 
 CREATE TABLE BATCH_JOB_INSTANCE  (
 	JOB_INSTANCE_ID BIGINT  NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY,

spring-batch-samples/src/main/resources/batch-sqlf.properties

@@ -1,5 +1,7 @@
 # Placeholders batch.*
 #    for SQLFire:
+# As of v4.3, SQLFire support is deprecated and scheduled for removal in v5.0
+
 batch.jdbc.driver=com.vmware.sqlfire.jdbc.ClientDriver
 batch.jdbc.url=jdbc:sqlfire://localhost:1257/;update=true
 batch.jdbc.user=SAMPLES

spring-batch-samples/src/main/resources/business-schema-sqlf.sql

@@ -1,5 +1,7 @@
 -- Autogenerated: do not edit this file
 -- You might need to remove this section the first time you run against a clean database
+-- As of v4.3, SQLFire support is deprecated and scheduled for removal in v5.0
+
 DROP TABLE  IF EXISTS BATCH_STAGING_SEQ ;
 DROP TABLE  IF EXISTS TRADE_SEQ ;
 DROP TABLE  IF EXISTS CUSTOMER_SEQ ;