tests: suspected memory leak of 160-disable-init-by-lua.t when test with TEST_NGINX_CHECK_LEAK=1 because forgot to close the file. (#1877)

Author: zhuizhuhaomeng

t/160-disable-init-by-lua.t

@@ -33,6 +33,7 @@ my $http_config = <<_EOC_;
             end
 
             assert(f:write(conf))
+            f:close()
 
             return conf_file
         end
@@ -85,6 +86,8 @@ __DATA__
             else
                 ngx.log(ngx.WARN, out)
             end
+            p:close()
+            collectgarbage("collect")
         }
     }
 --- error_log
@@ -115,6 +118,7 @@ qr/\[error\] .*? init_by_lua:\d+: run init_by_lua/
             else
                 ngx.log(ngx.WARN, out)
             end
+            p:close()
 
             local cmd = nginx .. " -p $TEST_NGINX_HTML_DIR -c " .. conf_file .. " -T"
             local p, err = io.popen(cmd)
@@ -130,6 +134,8 @@ qr/\[error\] .*? init_by_lua:\d+: run init_by_lua/
             else
                 ngx.log(ngx.WARN, out)
             end
+            p:close()
+            collectgarbage("collect")
         }
     }
 --- error_log
@@ -171,6 +177,7 @@ qr/\[error\] .*? init_by_lua:\d+: run init_by_lua/
             else
                 ngx.log(ngx.WARN, out)
             end
+            p:close()
 
             local cmd = nginx .. " -p $TEST_NGINX_HTML_DIR -c " .. conf_file .. " -T"
             local p, err = io.popen(cmd)
@@ -186,6 +193,8 @@ qr/\[error\] .*? init_by_lua:\d+: run init_by_lua/
             else
                 ngx.log(ngx.WARN, out)
             end
+            p:close()
+            collectgarbage("collect")
         }
     }
 --- error_log