update CI version.

.gitlab-ci.yml

@@ -11,7 +11,7 @@ cache:
 before_script:
   - apt-get update -y && apt-get -y install libgl1-mesa-glx 
   - mkdir -p /usr/share/man/man1mkdir -p /usr/share/man/man1
-  - apt-get -y install -f openjdk-11-jre-headless texlive-latex-extra dvipng
+  - apt-get -y install -f openjdk-16-jre-headless texlive-latex-extra dvipng
   - conda env create -f environment.yml
   - source activate resultsanalysis
   - conda install -c conda-forge phasexmlparser