OpenAPI schema generation from YANG

Change-Id: Id687fbeefd6aa23b2d34a07511847751b3f67b50
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Dockerfile b/Dockerfile
index 1e89c8f..419f8db 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,8 @@
   DEBIAN_FRONTEND=noninteractive apt-get -y install git make wget python \
                                             python3 python3-all python3-pip python-pip \
                                             debhelper tox python-setuptools \
-                                            python3-setuptools build-essential dh-make && \
+                                            python3-setuptools build-essential dh-make \
+                                            openjdk-8-jdk maven && \
   DEBIAN_FRONTEND=noninteractive pip3 install pip==9.0.3 && \
   DEBIAN_FRONTEND=noninteractive pip3 install -U pyang pyangbind && \
   DEBIAN_FRONTEND=noninteractive pip3 install -U stdeb && \