Call build-go.sh before bundling a release

Now the dev-build-and-* scripts actually work.
Rename IsEtcdConflict to IsEtcdTestFailed
Merge pull request #784 from nyaxt/avoid_magicnum

Rename IsEtcdConflict to IsEtcdTestFailed
Make container-to-container IP work across VMs.
Merge pull request #774 from thockin/cleanups

Call build-go.sh before bundling a release
Merge pull request #787 from thockin/network

Make container-to-container IP work across VMs.
httptest.NewTLSServer is ~0.2s of setup per test

We're not exercising anything TLS related in client and request,
set these back to NewServer.  Should add a new TLS end-to-end
test for hack/test-cmd.sh with real (test) certs.
Merge pull request #788 from smarterclayton/use_regular_http_in_tests

httptest.NewTLSServer is ~0.2s of setup per test