Update yang2swagger version to 2.1.0

Change-Id: I16dc02009cc61f8452f3a0787b288d9c140c4ea8
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Dockerfile b/Dockerfile
index 3ca4992..cdecfd2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,5 +44,5 @@
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install wget build-essential dh-make \
-                                              openjdk-8-jdk maven
-RUN update-java-alternatives --set /usr/lib/jvm/java-1.8.0-openjdk-amd64
+                                              openjdk-17-jdk maven
+RUN update-java-alternatives --jre-headless --set /usr/lib/jvm/java-1.17.0-openjdk-amd64