states/pkg.py and warnings on module failures.

Description of Issue/Question

states/pkg.py seems to pass back warnings, when the warnings come from states/pkg.py itself
Seems it does not support warnings being returned from modules/pkg*

e.g. It looks like it should be

if exc.info:
    if 'warnings' in exc.info # add the module warnings
        ret.setdefault('warnings', []).extend(exc.info.get('warnings'))

Sample code from states/pkg.py

        except CommandExecutionError as exc:
            ret = {'name': name, 'result': False}
            if exc.info:
                # Get information for state return from the exception.
                ret['changes'] = exc.info.get('changes', {})
                ret['comment'] = exc.strerror_without_changes
            else:
                ret['changes'] = {}
                ret['comment'] = ('An error was encountered while installing '
                                  'package(s): {0}'.format(exc))
            if warnings: # add the state warnings
                ret.setdefault('warnings', []).extend(warnings)
            return ret

Version

develop but sure it would have existing in early versions

Start in states/pkg.py, especially the CommandExecutionError handler shown in the issue, and trace how warnings from modules/pkg* are placed in the exception info. Done means warnings returned by those modules are included in the state result on package failures, alongside existing state warnings.