Add migration script to use characters instead of bytes for oracle db

Resolves BATCH-2091

spring-batch-core/src/main/resources/org/springframework/batch/core/migration/4.1/migration-oracle10g.sql

@@ -0,0 +1,19 @@
+ALTER TABLE BATCH_JOB_INSTANCE MODIFY JOB_NAME VARCHAR2(100 char);
+ALTER TABLE BATCH_JOB_INSTANCE MODIFY JOB_KEY VARCHAR2(32 char);
+
+ALTER TABLE BATCH_JOB_EXECUTION MODIFY STATUS VARCHAR2(10 char);
+ALTER TABLE BATCH_JOB_EXECUTION MODIFY EXIT_CODE VARCHAR2(2500 char);
+ALTER TABLE BATCH_JOB_EXECUTION MODIFY EXIT_MESSAGE VARCHAR2(2500 char);
+ALTER TABLE BATCH_JOB_EXECUTION MODIFY JOB_CONFIGURATION_LOCATION VARCHAR2(2500 char);
+
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS MODIFY TYPE_CD VARCHAR2(6 char);
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS MODIFY KEY_NAME VARCHAR2(100 char);
+ALTER TABLE BATCH_JOB_EXECUTION_PARAMS MODIFY STRING_VAL VARCHAR2(250 char);
+
+ALTER TABLE BATCH_STEP_EXECUTION MODIFY STEP_NAME VARCHAR2(100 char);
+ALTER TABLE BATCH_STEP_EXECUTION MODIFY STATUS VARCHAR2(10 char);
+ALTER TABLE BATCH_STEP_EXECUTION MODIFY EXIT_CODE VARCHAR2(2500 char);
+ALTER TABLE BATCH_STEP_EXECUTION MODIFY EXIT_MESSAGE VARCHAR2(2500 char);
+
+ALTER TABLE BATCH_STEP_EXECUTION_CONTEXT MODIFY SHORT_CONTEXT VARCHAR2(2500 char);
+ALTER TABLE BATCH_JOB_EXECUTION_CONTEXT MODIFY SHORT_CONTEXT VARCHAR2(2500 char);