base-java: include jdk package

* base-java: include jdk package

base-java/Dockerfile

@@ -4,5 +4,5 @@ FROM ${JITSI_REPO}/base:${BASE_TAG}
 
 RUN mkdir -p /usr/share/man/man1 && \
     apt-dpkg-wrap apt-get update && \
-    apt-dpkg-wrap apt-get install -y openjdk-11-jre-headless && \
+    apt-dpkg-wrap apt-get install -y openjdk-11-jre-headless openjdk-11-jdk-headless && \
     apt-cleanup