HPCC-9147 Change error to warning on mismatch major version

Also update the versions in some examples to check correct differences.

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4258 from ghalliday/issue9147

HPCC-9147 Change error to warning on mismatch major version

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>