Issue 202: Replaced assertj assertions in simple-linked-list with junit and hamcrest assertions. Removed assertj from simple-linked-list gradle build file.
- in journey test, remove @Ignores so that test runs exercise all tests.
- increase the verbosity of test logging to aide in seeing progress as
tests are un@Ignored and solved.
- saving scripts used to make changes to all exercises. These are the
start of a library of scripts making such changes easier.
- make Gradle output more CI-friendly.