resultMap Bug when SQL using "as" aliases for column names

[dankirkd]

I think I've found a bug related to resultMaps and SQL that include "as" aliases. I've created a PR with tests that expose the problem. Please see that PR for details. I think the bug was created with #895, but I'm not sure.

MyBatis version

Broken starting with 3.4.3.

Database vendor and version

N/A

Test case or example project, Steps to reproduce, Expected result, Actual result

See #1100

[dankirkd]

Discussion and resolution at #1100