After we stopped forking the compiler, some folks are running into out
of memory errors. This commit is a bump to the Gradle heap to workaround
these out of memory errors (until we can better understand their
source).
This commit adds a property that will prevent the Gradle daemon from
being used for builds (even if one is running). This is to avoid some
nasty issues (e.g., SIGBUS faults and other mmap diasters) that result
from class loaders not being closed properly.
Some dependencies must be specified in a couple places in the build.
e.g. randomized runner is specified both in buildSrc (for the gradle
wrapper plugin), as well as in the test-framework.
This change creates buildSrc/versions.properties which acts similar to
the set of shared version properties we used to have in the maven parent
pom.