Submitted by: @mrotteveel

Is related to JDBC492

#⁠#⁠#⁠ Removal of deprecated methods #⁠#⁠#⁠

The following methods will be removed in Jaybird 3.1:

- `CharacterTranslator.getMapping()`, use `CharacterTranslator.getMapping(char)`
instead.

Complete removal of the character translation support is also being
considered, as similar effects can be achieved by a custom encoding 
implementation\.

- `GDSHelper.iscVaxInteger(byte[] buffer, int pos, int length)` use
`VaxEncoding.iscVaxInteger(byte[] buffer, int startPosition, int length)`
instead.
- `GDSHelper.iscVaxLong(byte[] buffer, int pos, int length)` use
`VaxEncoding.iscVaxLong(byte[] buffer, int startPosition, int length)`
instead.
- `MaintenanceManager.commitTransaction(int transactionId)`, use
`MaintenanceManager.commitTransaction(long transactionId)` instead.
- `MaintenanceManager.rollbackTransaction(int transactionId)`, use
`MaintenanceManager.rollbackTransaction(long transactionId)` instead.

#⁠#⁠#⁠ Removal of deprecated constants #⁠#⁠#⁠

The following constants will be removed in Jaybird 3.1:

- All `SQL_STATE_*` constants in `FBSQLException`,
`FBResourceTransactionException`, `FBResourceException`, and
`FBDriverNotCapableException` will be removed. Use equivalent constants in
`org.firebirdsql.jdbc.SQLStateConstants`.

Commits: a994b48