Correctly setup the local m2 repo for zinc
Remove unused variables
Scala should not be rebuildt in pr-scala validation
Checks cache for recreated versions.propertie
Use already defined variable
Use more precise sbt version for internal builds
Better managment of missing versions.properties
Removes support for pre-compiled zinc
Fixes bad if syntax
Copy versions file to the right name
Removes resolved TODOs
Externalizes dbuild proxy configuration
Small clean-ups
Reverts the LOCAL_M2_REPO changes done in 090a5eaf
Update of some of the config files