Install python inside travis.

Author: VolkerHartmann

.travis.yml

@@ -12,6 +12,10 @@ jdk:
 before_install:
 - docker pull elasticsearch:7.9.3
 - docker run -d --name elasticsearch4metastore  -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.9.3
+- sudo apt-get update
+- sudo apt-get upgrade --assume-yes
+- sudo apt-get install --assume-yes python3 python3-pip 
+- pip3 install xmltodict wget
 
 install: true