Pass test run exit code to cleanup

Author: russcam

.ci/run-tests.ps1

@@ -67,7 +67,9 @@ function log {
 }
 
 function cleanup {
-    $status=$?
+    param(
+        $RunExitCode
+    )
 
     $runParams = @{
       NODE_NAME= $NODE_NAME
@@ -78,12 +80,12 @@ function cleanup {
     ./.ci/run-elasticsearch.ps1 @runParams
 
     # Report status and exit
-    if ($status -eq 0) {
+    if ($RunExitCode -eq 0) {
       log "run-tests" -Level Success
       exit 0
     } else {
       log "failure during run-tests" -Level Error
-      exit $status
+      exit $RunExitCode
     }
 }
 
@@ -126,8 +128,10 @@ docker run `
 elastic/elasticsearch-rs `
 cargo test $CARGO_TEST_FLAGS
 
-if ($LASTEXITCODE) {
+$runExitCode = $LASTEXITCODE
+
+if ($runExitCode -ne 0) {
     docker rm elasticsearch-rs
 }
 
-cleanup
+cleanup $runExitCode