pq: do author guessing outside the apply_patch functions

pq: do author guessing outside the apply_patch functions

Call the author parsing/guessing function outside the apply patch
functions. This way, the caller can decide when to do the guessing, and
with which parameters. Now the apply_patch functions do what their name
suggests.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>