Support comments within SQL statements in JdbcTestUtils

Status Quo

Executing an SQL script via JdbcTestUtils.executeSqlScript() with the following content fails.

INSERT INTO persons( person_id
                   , name)
VALUES( 1      -- person_id
      , 'Name' --name
);

org.springframework.jdbc.BadSqlGrammarException: StatementCallback; bad SQL grammar [INSERT INTO persons( person_id                   , name)VALUES( 1      - person_id      , 'Name' --name)]; nested exception is java.sql.SQLSyntaxErrorException: ORA-00917: missing comma

Proposed Solutions

1. keep the carriage returns after each line when building statements (line 388 389)
2. strip all characters (per line) after the DEFAULT_COMMENT_PREFIX (including the prefix)

I think solution 1 is preferred, since 2 might become db dependent.

Deliverables

1. Ensure that multi-line statements which contain comments can be executed.