tests: use a domain with ownership instead of notexistdomain.com in t/014-bugs.t.

Author: xiaocang

t/014-bugs.t

@@ -179,7 +179,7 @@ https://github.com/openresty/lua-nginx-module/issues/1915
             return true
         end
 
-        local host = "www.notexistdomain.com"
+        local host = "notexistdomain.openresty.org"
         local port = 80
 
         local threads = {}
@@ -205,7 +205,7 @@ GET /t
 --- response_body
 res: false
 --- error_log
-www.notexistdomain.com could not be resolved
+notexistdomain.openresty.org could not be resolved
 
 
 
@@ -279,7 +279,7 @@ https://github.com/openresty/lua-nginx-module/issues/1915
             return true
         end
 
-        local host = "www.notexistdomain.com"
+        local host = "notexistdomain.openresty.org"
         local port = 80
 
         local threads = {}
@@ -305,7 +305,7 @@ GET /t
 --- response_body
 res: false
 --- error_log
-www.notexistdomain.com could not be resolved
+notexistdomain.openresty.org could not be resolved