Fixes integration tests.

Adding sizes to VARCHAR fields.

Original pull request #2065
See #2064

spring-data-jdbc/src/test/resources/org.springframework.data.jdbc.core/JdbcAggregateTemplateIntegrationTests-mssql.sql

@@ -447,6 +447,6 @@ DROP TABLE BEFORE_CONVERT_CALLBACK_FOR_SAVE_BATCH;
 
 CREATE TABLE BEFORE_CONVERT_CALLBACK_FOR_SAVE_BATCH
 (
-    ID VARCHAR PRIMARY KEY,
-    NAME VARCHAR
+    ID VARCHAR(50) PRIMARY KEY,
+    NAME VARCHAR(50)
 );

spring-data-jdbc/src/test/resources/org.springframework.data.jdbc.core/JdbcAggregateTemplateIntegrationTests-oracle.sql

@@ -453,6 +453,6 @@ CREATE TABLE THIRD
 
 CREATE TABLE BEFORE_CONVERT_CALLBACK_FOR_SAVE_BATCH
 (
-    ID VARCHAR PRIMARY KEY,
-    NAME VARCHAR
+    ID VARCHAR(50) PRIMARY KEY,
+    NAME VARCHAR(50)
 );