-Werror javac compilerArg lost during move to multi modules

While code reviewing https://github.com/apache/fineract/pull/1402/ for FINERACT-1189, I've just realized that as part of the overall FINERACT-1171 effort to move to multi modules, and refactoring moves in the build scripts, we could be more careful not to introduce regressions.

Specifically, I've noticed that the -Werror javac compilerArg introduced in FINERACT-959 was at least temporarily lost again (it's currently commented out with a TODO from the root /build.gradle, and being removed from fineract-provider/build.gradle.

aleks is this regression something you will fix and raise a PR for?

ptuomola FYI.