Bugfix: reporting docker image build failed

Bugfix: reporting docker image build failed

JIRA: RELENG-181

Since we just decide to use dynamic server, we need to deploy a dynamic
server such as tornado . But when I use the Dockerfile to build image,
it failed due to some reasons. So I need fix it first and then deploy
the dynamic server.

Then we can use this command:

docker run -it -d -p 8080:80 opnfv/releng:latest

And visit reporting page by http://server_ip:8080/display/...

Change-Id: Id04575c7b38e4c07625ce217d23ebca1c5bf0191
Signed-off-by: chenjiankun <chenjiankun1@huawei.com>