Extending test timeout on riscv64 and s390

These platforms can take over 10 hours to run a full suite of
extended.openjdk tests, even when split between 3 parallel machines.

Therefore we should extend the timeout to allow the tests to run to
completion.

Signed-off-by: Adam Farley <adfarley@redhat.com>

pipelines/build/common/openjdk_build_pipeline.groovy

@@ -187,6 +187,10 @@ class Build {
         def arch = buildConfig.ARCHITECTURE
         if (arch == 'x64') {
             arch = 'x86-64'
+        } else if (arch == 's390x') {
+            jobParams.put('TIME_LIMIT', '20')
+        } else if (arch == 'riscv64') {
+            jobParams.put('TIME_LIMIT', '20')
         }
         def arch_os = "${arch}_${buildConfig.TARGET_OS}"
         jobParams.put('ARCH_OS_LIST', arch_os)