Use lager version 2.0.3.
Use lager version 2.0.3.

We use a lager tag to make sure regressions in lager will not cause issues for disco.
mwilliams3/disco,beni55/disco,mozilla/disco,discoproject/disco,pombredanne/disco,simudream/disco,discoproject/disco,mwilliams3/disco,seabirdzh/disco,seabirdzh/disco,discoproject/disco,ErikDubbelboer/disco,beni55/disco,pooya/disco,discoproject/disco,seabirdzh/disco,mozilla/disco,simudream/disco,beni55/disco,oldmantaiter/disco,ktkt2009/disco,mozilla/disco,oldmantaiter/disco,ktkt2009/disco,pooya/disco,mozilla/disco,ktkt2009/disco,simudream/disco,ErikDubbelboer/disco,pooya/disco,pombredanne/disco,ErikDubbelboer/disco,simudream/disco,pombredanne/disco,ktkt2009/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,seabirdzh/disco,simudream/disco,mwilliams3/disco,oldmantaiter/disco,oldmantaiter/disco,discoproject/disco,pooya/disco,beni55/disco,mwilliams3/disco,pombredanne/disco,seabirdzh/disco,ktkt2009/disco,pombredanne/disco,mwilliams3/disco,beni55/disco,oldmantaiter/disco