Adds support for binary host variable declarations for DB2 within COBOL conforming to the IBM standard for their preprocessor.

Added bounds check per IBM's documentation for BINARY and VARBINARY types for their DB2 preprocessor.

Simplified the errors given to the end user. No need to tell them twice that negatives are not allowed.

…ost-Variable-Support

Add unit tests and changed the range check to an easier to read and understand function.

Remove unused message that was previously added as a commit to this PR.

Added a check for the offending token such that it properly denotes where the issue is rather than the one after it.
Updated unit tests to reflect these changes.

…ects/sql/MessageServiceParser.java

Co-authored-by: Aman Prashant <aman.prashant@broadcom.com>

Add size requirement for BINARY VARYING.