does not run tests as part of main docker build

[sneak]

Now that the Dockerfile is building both a web node and a p2p node type, the builds on Docker Hub are timing out. This removes the full test build/run in the Dockerfile (which was only there as a sort of belt-and-suspenders approach, as we do the exact same tests before merging to develop or master anyway).

[sneak]

@steemit/steem-develop-committers ping

[theoreticalbts]

Rebase these into a single commit and I'll merge it.

git rebase -i  origin/develop

Change first commit to reword and subsequent lines to fixup. Add #488 in the new commit message. Then update the commit date and force-push to this branch to update the PR:

git commit --amend "--date=$(date)"
git push -f origin HEAD:sneak/remove-tests-from-prod-build

[sneak]

Github lets you squash them on PR merge, afaik. Rebasing as requested.

[sneak]

ping @theoreticalbts