update lua upstream test

Author: lhanjian

.github/workflows/ci.yml

@@ -114,11 +114,12 @@ jobs:
          prove -v -Inginx-tests/lib ../../modules/ngx_debug_timer/t
          prove -v -Inginx-tests/lib ../../modules/ngx_debug_conn/t
          prove -v -Inginx-tests/lib ../../modules/ngx_slab_stat/t
-         prove -v -Inginx-tests/lib ../../modules/ngx_http_lua_upstream/t
      - name: tengine test cases using test-nginx lib
        working-directory: tests/test-nginx
        run: |
          sudo cpanm --notest Shell Test::Base Test::LongString List::MoreUtils LWP::UserAgent HTTP::Response  > build.log 2>&1 || (cat build.log && exit 1)
          mkdir t
          PATH=/usr/local/nginx/sbin:$PATH \
          prove -v -Itest-nginx/lib cases/
+         PATH=/usr/local/nginx/sbin:$PATH \
+         prove -v -Itest-nginx/lib ../../modules/ngx_http_lua_upstream/t