Openjdk-tests: Update TestConfig scripts that download third party jars to use cURL when on z/OS

[Mesbah-Alam]

Background: https://github.ibm.com/runtimes/infra-can/issues/117#issuecomment-6359814

In TestConfig perl scripts where wget is used to download third party jars, we need to use cURL instead, when on z/OS.

wget doesn't work on z/OS, as evident in the following job: https://urv-jenkins.canlab.ibm.com:9095/view/SV_Tests/job/ibmjava8_systemtest_s390x_zos/32/console

cURL example :

cd target/path
curl -o ${download_url}

[sophia-guo]

When using curl we need also update Document to add curl as a prerequisite eventually.

[smlambert]

options to consider:
1) switch over to curl for all platforms and remove the dependency on wget, to keep the prereqs 'simple'
2) have scripts check for presence of curl, use it if there, fall back to try using wget if not
3) just use curl for zos, as suggested, leaving other platforms as is for now

[smlambert]

I didn't see @renfeiw PR already :) happy to go option 3 for now, think about if we want go further with it later.

[renfeiw]

I have PR for option 3, and am testing it now. I agree, we keep it for now and we can extend it later on.

[Mesbah-Alam]

@renfeiw - thanks for adding the curl option. I tested the PR you posted off of your branch, and it 00:01:17.198 downloaded dependent third party jars successfully. Please check the z/OS job.
(It however, fails now for a different reason; will discuss about it offline).

[smlambert]

Closing this issue as PR has been delivered. (in future, we can/should try to use 'Fixes' keyword in PR comment to auto-close issues they address).

[AdamBrousseau]

1. have scripts check for presence of curl, use it if there, fall back to try using wget if not

+1