Update gem dependencies
Switch to using provisionerless base box
Fix potential namespacing issue with Mongo class

It only seems to pop up on occasion, which is unexpected.
Correctly set ulimit for mongo processes

closes #2
Add option for setting TCP keepalive time

closes #1
Fix foodcritic violation for not using conditional attribute
Bump version to 1.1.0
Add changelog for 1.1.0 release