985502: Use yum.i18n utf8_width function for string length in CLI

Our --list output in some languages (*_IN.UTF-8) was not properly
aligned.  Yum has already solved this problem, so we can pull in
the method they use.
Merge pull request #814 from candlepin/ckozak/cli_alignment_unicode

985502: Use yum.i18n utf8_width function for string length in CLI