Fixing correct terminal detection

Avoiding setting fonts of terminal if its not ttyxx terminal
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1162449
Change-Id: I010c2bf79bfe98b3b5ebc2f54246690c1bcfbffc
Signed-off-by: Tolik Litovsky <tlitovsk@redhat.com>