Enable migration from Nebula locks to Gradle core locks

[OdysseusLives]

Enable migration from Nebula locks to Gradle core locks with '-PmigrateLocks=true' and coreLockingSupport enabled

[coveralls]

Coverage increased (+2.8%) to 88.202% when pulling 0971dc7 on migrate_locks into 6ec1b85 on master.

[rpalcolea]

LGTM. I like it.

Just one question, not a show stopper

./gradlew -DmigrateLocks=true

Is there an advantage of using a flag instead of creating a gradle task to migrate? I guess creating the task would require more work to apply the plugin? thoughts?

[OdysseusLives]

Yeah. I thought about making another task. On one hand, tasks are awesome! On the other, this is something you're really likely to only run once, so it's less important to be a task perhaps. Doing it this way also seemed simpler from the task setup viewpoint, though that can be changed if we want.

[rpalcolea]

This is great! Can’t wait to see it in action