chore(upgrade-nexes): add nexus docker resources

Nexus 2.10 includes support for npm registrys
chore(nexus-upgrade): update gocd-agent to use nexus for npm resources
chore(nexus-upgrade): delete npm-shrinkwrap
chore(protractor): upgrade to 1.4.0

And switch to use direct connect.
chore(merge): merge master commit '0ae8774' into nexus-upgrade
chore(merge): merge branch 'master' into nexus-upgrade
Merge pull request #47 from HSLdevcom/nexus-upgrade

Nexus upgrade