fix(tests) pin lua-nginx-module and lua-resty-core

Author: fffonion

.travis.yml

@@ -50,9 +50,9 @@ install:
   - git clone https://github.com/openresty/openresty.git ./openresty
   - git clone https://github.com/openresty/nginx-devel-utils.git
   - git clone https://github.com/simpl/ngx_devel_kit.git ./ndk-nginx-module
-  - git clone https://github.com/openresty/lua-nginx-module.git ./lua-nginx-module
+  - git clone https://github.com/openresty/lua-nginx-module.git ./lua-nginx-module -b v0.10.17
   - git clone https://github.com/openresty/no-pool-nginx.git ./no-pool-nginx
-  - git clone https://github.com/openresty/lua-resty-core.git ../lua-resty-core
+  - git clone https://github.com/openresty/lua-resty-core.git ../lua-resty-core -b v0.1.19
   - git clone https://github.com/openresty/lua-resty-lrucache.git ../lua-resty-lrucache
   - git clone https://github.com/jkeys089/lua-resty-hmac ../lua-resty-hmac && pushd ../lua-resty-hmac && git checkout 79a4929 && popd
   - git clone https://github.com/openresty/lua-resty-string ../lua-resty-string