modify schema

spring-security-oauth/spring-security-oauth-server/src/main/resources/schema.sql

@@ -1,5 +1,5 @@
--- used in tests that use HSQL
-create table if not exists oauth_client_details (
+drop table if exists oauth_client_details;
+create table oauth_client_details (
   client_id VARCHAR(255) PRIMARY KEY,
   resource_ids VARCHAR(255),
   client_secret VARCHAR(255),
@@ -13,7 +13,8 @@ create table if not exists oauth_client_details (
   autoapprove VARCHAR(255)
 );
 
-create table if not exists oauth_client_token (
+drop table if exists oauth_client_token;
+create table oauth_client_token (
   token_id VARCHAR(255),
   token LONG VARBINARY,
   authentication_id VARCHAR(255) PRIMARY KEY,
@@ -21,7 +22,8 @@ create table if not exists oauth_client_token (
   client_id VARCHAR(255)
 );
 
-create table if not exists oauth_access_token (
+drop table if exists oauth_access_token;
+create table oauth_access_token (
   token_id VARCHAR(255),
   token LONG VARBINARY,
   authentication_id VARCHAR(255) PRIMARY KEY,
@@ -31,17 +33,20 @@ create table if not exists oauth_access_token (
   refresh_token VARCHAR(255)
 );
 
-create table if not exists oauth_refresh_token (
+drop table if exists oauth_refresh_token;
+create table oauth_refresh_token (
   token_id VARCHAR(255),
   token LONG VARBINARY,
   authentication LONG VARBINARY
 );
 
-create table if not exists oauth_code (
+drop table if exists oauth_code;
+create table oauth_code (
   code VARCHAR(255), authentication LONG VARBINARY
 );
 
-create table if not exists oauth_approvals (
+drop table if exists oauth_approvals;
+create table oauth_approvals (
 	userId VARCHAR(255),
 	clientId VARCHAR(255),
 	scope VARCHAR(255),
@@ -50,8 +55,8 @@ create table if not exists oauth_approvals (
 	lastModifiedAt TIMESTAMP
 );
 
--- customized oauth_client_details table
-create table if not exists ClientDetails (
+drop table if exists ClientDetails;
+create table ClientDetails (
   appId VARCHAR(255) PRIMARY KEY,
   resourceIds VARCHAR(255),
   appSecret VARCHAR(255),