Set user explicitly for gerrit communication in gh import prs

Change-Id: Ic8f31e39e7f27600c9fd9a1c6f4ac5082708b457
diff --git a/bin/import_github_pull_requests b/bin/import_github_pull_requests
index 566fbbd..d8b2235 100755
--- a/bin/import_github_pull_requests
+++ b/bin/import_github_pull_requests
@@ -103,7 +103,7 @@
 #
 # git push origin HEAD:refs/for/master
 #
-# ssh -p 29418 korap gerrit review --code-review $REVIEW_SUGGESTION \$(git rev-list $OLDHEAD..HEAD)
+# ssh -p 29418 $USER@korap gerrit review --code-review $REVIEW_SUGGESTION \$(git rev-list $OLDHEAD..HEAD)
 
 EOF
 fi