Bug 497548 - Make use of StandardCharsets

All the various places defining and using different UTF-8 charset name
constants is too error prone. Let's stick to StandardCharsets.UTF-8
which even saves the string lookup too.

Change-Id: Idcb356d0293cd2d0d0148de4e1f2e131584d09c4
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
9 files changed