Reorder member functions in RtpFecTest.
Reorder member functions in RtpFecTest.

Place member functions before tests. No changes to the functionality.

BUG=webrtc:5654
R=danilchap@webrtc.org

Review URL: https://codereview.webrtc.org/2297533002 .

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#14322}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: ea7beb9741da38043432aefb695731c49ff7c413

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk