Use cluster setup in dev run

[kxepal]

Since /_cluster_setup requires Admin Party to be fixed it's not suitable for running our JavaScript test suite which requires Admin Party to be on. So the old way to make a cluster is provided now as an option.

Also I a bit modified output to make it nicer and show all possible issues without making a look that it's hanged:

[ * ] Setup environment ... ok
[ * ] Ensure CouchDB is built ... ok
[ * ] Prepare configuration files ... ok
[ * ] Start node node1 ... ok
[ * ] Start node node2 ... ok
[ * ] Start node node3 ... ok
[ * ] Check node at http://127.0.0.1:15984/ ... failed: <urlopen error [Errno 111] Connection refused>
[ * ] Check node at http://127.0.0.1:25984/ ... failed: <urlopen error [Errno 111] Connection refused>
[ * ] Check node at http://127.0.0.1:35984/ ... ok
[ * ] Check node at http://127.0.0.1:15984/ ... ok
[ * ] Check node at http://127.0.0.1:25984/ ... ok
[ * ] Running cluster setup ... ok
[ * ] Developers cluster is set up at http://127.0.0.1:15984.
Admin username: root
Password: AaqFj+kO
Time to hack! ... 

cc @janl @robertkowalski

[robertkowalski]

Cool idea! +1 on integrating cluster_setup more

Can we just use /_cluster_setup if the --admin flag was provided? this way we would not need the --with-admin-party-please flag, right?

I guess this would also solve possible issues with:

./dev/run --admin=foo:bar --with-admin-party-please

(which I haven't tested)

[kxepal]

Good point about --admin and --with-admin-party-please conflict, but word please is much stronger and forces Admin Party to be applied (:

The problem is that 95% of users will not run this script with --admin parameter => dev/run will not use /_cluster_setup => users will not fix admin party => these cases will not be tested.

Since real cluster will always run with fixed Admin Party, we need to encourage uses to run dev cluster as well with no Admin Party, unless they explicitly want to not fix it. That is the idea I implemented here: if you didn't specify admin credentials, script generated them for you.