Use curl and not wget by default to avoid LetsEncrypt SSL handshake for freemarker and boot JDK downloads

[sxa]

This is impacting the OpenJ9 buids which use freemarker and I believe curl will work on the affected systems (or at least many of them!) as it uses it's own CA store.

FYI @AdamBrousseau

Signed-off-by: Stewart X Addison [email protected]

[sxa]

VPC run to check this (along with adoptium/infrastructure#2339 which is failing with the CentOS site)

[AdamBrousseau]

I drafted ibmruntimes/ci-jenkins-pipelines#28 and ibmruntimes#3 which are untested at the moment. Since the only remaining platform that requires freemarker is riscv, @pshipton was ok with breaking it until cmake support was ready. Alternatively we could change the if to only download on that platform. I think the ideal check would be "if not cmake" or "if uma" but I'm unsure what info we have at the time of the check/download.

[pshipton]

ok with breaking it until cmake support was ready

Not what I meant. I meant I'm ok to break it for a week or two while we look for a workaround. Not sure when cmake will be ready, that might be too long.

[sxa]

run tests

[karianna]

LGTM

[smlambert]

LGTM