Add Reek pre-commit hook

Pre-commit hook to analise code for "code smells" with Reek
"code smell" detector https://github.com/troessner/reek

Change-Id: I6c582bf388499232b8d631af929ea2d293f8ccec
Reviewed-on: http://gerrit.causes.com/44217
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>
Update changelog with Reek

Change-Id: Iaca4f3632a827b4ec8ae3d02c5341d399665a2ab
Reviewed-on: http://gerrit.causes.com/44218
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>