Speed-up scripted by reusing user-wide compiler bridges
Speed-up scripted by reusing user-wide compiler bridges

Defining "sbt.boot.directory" makes the scripted test (re)use the same
user-shared compiler bridge instead of compiling one every time.

ignasi35/lagom,ignasi35/lagom,lagom/lagom,ignasi35/lagom,ignasi35/lagom,lagom/lagom,lagom/lagom,ignasi35/lagom,lagom/lagom,lagom/lagom