frontend: rename methods to begin with lowercase letter

Although a method name can be any legal identifier, code
conventions restrict method names.
By convention, method names should be a verb in lowercase or
a multi-word name that begins with a verb in lowercase.

Change-Id: I59208bc41dd89ac1996f2f9e3c291e880d958fc5
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>