add dev mode IT

[awisniew90]

Notes:

1. The framework for this IT was taken from the LMP's dev mode test
2. The IT project test-liberty-dev-mode is just a shell project with test classes. The test classes create and build a boost project from "resources/basic-dev-project".
3. There are several Thread.sleep() calls. Due to the nature of testing dev mode, we occasionally need to wait for the process to fully complete before moving on to another test.