Remove interactivity from Docker script (#136)

* fix TTY issue in verify script

gen-code.sh

@@ -18,7 +18,7 @@ rm -rf demisto_client/demisto_api
 rm -rf docs
 mkdir -p demisto_client
 mv README.md README.md.org
-docker run --rm -it -u `id -u` -v `pwd`:/work -w /work swaggerapi/swagger-codegen-cli:2.4.7 generate -i /work/server_api_swagger.json -l python -o /work -c /work/swagger-config.json
+docker run --rm -u `id -u` -v `pwd`:/work -w /work swaggerapi/swagger-codegen-cli:2.4.7 generate -i /work/server_api_swagger.json -l python -o /work -c /work/swagger-config.json
 rm -rf test
 mv demisto_client.demisto_api/*.py demisto_client/demisto_api/.
 mv demisto_client.demisto_api/api/*.py demisto_client/demisto_api/api/.