[FEAT] add Log4Perl

We do logging with Log4perl because it is powerful, configurable and has
very little performance impact. We want to have a single place where to
decide which log level to use. Now the API can use this too.
[FIX] use module Log4perl
Use Log4perl also when not daemonized
merged reportsdb and testrundb
added Amazon Tapper Team as author to dist.ini
move pid file to other location