kola: add skipReprovision parameter

Some upstreams just want to run a subset of tests. For consistency with
the other `kola` runs in this file, make running the reprovisioning
tests skippable.

Author: jlebon

vars/kola.groovy

@@ -5,6 +5,7 @@
 //    parallel:          integer  -- number of tests to run in parallel (default: # CPUs)
 //    skipBasicScenarios boolean  -- skip basic qemu scenarios
 //    skipUpgrade:       boolean  -- skip running `cosa kola --upgrades`
+//    skipReprovision:   boolean  -- skip running reprovisioning tests
 //    build:             string   -- cosa build ID to target
 //    platformArgs:      string   -- platform-specific kola args (e.g. '-p aws --aws-ami ...`)
 //    extraArgs:         string   -- additional kola args for `kola run` (e.g. `ext.*`)
@@ -73,11 +74,13 @@ def call(params = [:]) {
             shwrap("tar -c -C ${outputDir} kola | xz -c9 > ${env.WORKSPACE}/${marker}-${token}.tar.xz")
             archiveArtifacts allowEmptyArchive: true, artifacts: "${marker}-${token}.tar.xz"
         }
-        try {
-            shwrap("cd ${cosaDir} && cosa kola run ${rerun} --output-dir=${outputDir}/kola-reprovision --build=${buildID} ${arch} ${platformArgs} --tag reprovision ${args} ${extraArgs}")
-        } finally {
-            shwrap("tar -c -C ${outputDir} kola-reprovision | xz -c9 > ${env.WORKSPACE}/${marker}-reprovision-${token}.tar.xz")
-            archiveArtifacts allowEmptyArchive: true, artifacts: "${marker}-reprovision-${token}.tar.xz"
+        if (!params['skipReprovision']) {
+            try {
+                shwrap("cd ${cosaDir} && cosa kola run ${rerun} --output-dir=${outputDir}/kola-reprovision --build=${buildID} ${arch} ${platformArgs} --tag reprovision ${args}")
+            } finally {
+                shwrap("tar -c -C ${outputDir} kola-reprovision | xz -c9 > ${env.WORKSPACE}/${marker}-reprovision-${token}.tar.xz")
+                archiveArtifacts allowEmptyArchive: true, artifacts: "${marker}-reprovision-${token}.tar.xz"
+            }
         }
         // sanity check kola actually ran and dumped its output in tmp/
         shwrap("test -d ${outputDir}/kola")