Upgraded to use newest version of mongo & fixed data volume binds

[mut3]

bowline was building and relying on the deprecated `dockerfile/mongodb'
https://registry.hub.docker.com/u/deprecateddockerfile/mongodb/

mongo has moved to 'library/mongo' and command syntax has changed somewhat
https://registry.hub.docker.com/_/mongo/

I upgraded the build_it and run_it scripts to use the newer and maintained version of mongo.

Due to an unrelated issue with container permissions I was unable to get the scripts to execute.

On line 30 of build_it.sh:

docker run -d -v $MONGO_DIR:/data/db --name temp_mongo library/mongo

(port binding to 27017 is now done automagically by mongo)

This container would exit as soon as it was started, meaning the link on line 36:

docker run -it --rm --link temp_mongo:mongo -v $EXAMPLE_DATA:/exampledata/ library/mongo \...

would fail, because you cannot link to a dead container.

The temp_mongo container was crashing and burning due to an error:

chown: cannot read directory `/data/db': Permission denied

That chown call comes from line 9 of the docker_entrypoint.sh script that is part of the mongo container.
https://github.com/docker-library/mongo/blob/master/3.0/docker-entrypoint.sh

The solution for this error, which would kill any docker run command with a -v data volume bind to a local directory, is to have the container run in --privileged mode, allowing it to access the host file system.
https://docs.docker.com/reference/run/#runtime-privilege-linux-capabilities-and-lxc-configuration

After adding the --privileged flag to lines that had previously error'd out in build_it.sh and run_it.sh I successfully* ran a locally hosted Bowline on my CentOS 7 box with Docker 1.6.0.

[dougbtv]

Awesome work. Looks excellent reviewing on mobile, I'll merge it when I'm back at a legitimate workstation.

Great finds all around, really appreciate it.

[dougbtv]

@mut3 -- thanks again! Appreciated it. Realized on your profile, you're also in Burlington, VT. Small world, as I am too. You should come drop by LaboratoryB.org and our spot on pine street at some point, I owe you a beer (or tea, if that's how you roll). Thanks Will.

[mut3]

@dougbtv I was planning to sometime soon. I realized that i didnt update the MONGO_CONNECT_STRING in includes/example.config.json to be mongo://mongo/bowline and I just pushed that, you could probably manually do it too.

[dougbtv]

Thanks @mut3 -- went ahead and manually corrected it, good eye. It's in master now, too.

[mut3]

I noted in #12 issues I believed to be outside the scope of this PR and did not stop the app from running with an attached mongo db.