Updated jenkins v2.280

jenkins/Dockerfile

@@ -1,4 +1,4 @@
-FROM jenkins/jenkins:2.277
+FROM jenkins/jenkins:2.280
 
 USER root
 RUN apt-get update \
@@ -9,7 +9,9 @@ RUN apt-get update \
         libgtk-3-0 \
         libdbus-glib-1-2 \
         xvfb \
-        mysql-client \
+        default-mysql-client \
+        build-essential \
+        python \
         vim \
     && curl -L https://github.com/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` \
         -o /usr/local/bin/docker-compose \