[CI] Use Ubuntu 18.04 LTS in JVM CI, because 19.04 is EOL (#5537)

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Philip Hyunsu Cho 2020-04-15 07:32:46 -07:00 committed by GitHub
parent 8b04736b81
commit ec02f40d42
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@ -1,4 +1,4 @@
FROM ubuntu:19.04
FROM ubuntu:18.04
ARG JDK_VERSION=8
ARG SPARK_VERSION=2.4.3