Elasticsearch versions earlier than 6.4.0 cannot properly run in a
FIPS 140 JVM. This commit ensures that we use a non-FIPS JVM for
nodes that we spin up in BWC tests even when we're testing FIPS.
* Detect and prevent configuration that triggers a Gradle bug
As we found in #31862, this can lead to a lot of wasted time as it's not
immediatly obvius what's going on.
Givent how many projects we have it's getting increasingly easier to run
into gradle/gradle#847.
Ioannis Kakavas
Alexander Reelsen
Alpar Torok
Ryan Ernst