Pin 'httpclient' to 2.3.4.1.
Pin 'httpclient' to 2.3.4.1.

Released over the weekend, httpclient 2.4.0 doesn't appear to be
compatible with rhc.

This has been reported as https://github.com/openshift/rhc/issues/602

LoicMahieu/dpl,giltsl/travis-test,johanneswuerbach/dpl,mathiasrw/dpl,clayreimann/dpl,wtcross/dpl,sebest/dpl,computology/dpl,gmegidish/dpl,jorihardman/dpl,jonathan-s/dpl,georgantasp/dpl,mattk42/dpl,goodeggs/dpl,pengsrc/dpl,Zyko0/dpl,travis-ci/dpl,testfairy/dpl,flowlo/dpl,nmohoric/dpl,WeConnect/dpl,testfairy/dpl,bensojona/dpl,tt/dpl,kalbasit/dpl,Misfit-SW-China/dpl,axelfontaine/dpl,felixrieseberg/dpl,travis-ci/dpl,adamjmcgrath/dpl,jsloyer/dpl,timoschilling/dpl,montaro/dpl,ianblenke/dpl,Hearst-Hatchery/dpl,travis-ci/dpl,zabawaba99/dpl,testfairy/dpl