[ADAM-2202] Bump Apache Spark dependency version to 2.4.4.

[heuermh]

Fixes #2202

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[...truncated 3 lines...]Building remotely on amp-jenkins-worker-05 (centos spark-test) in workspace /home/jenkins/workspace/ADAM-prbWiping out workspace first.Cloning the remote Git repositoryCloning repository https://github.com/bigdatagenomics/adam.git > git init /home/jenkins/workspace/ADAM-prb # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > git --version # timeout=10 > git fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/heads/:refs/remotes/origin/ # timeout=15 > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10 > git config --add remote.origin.fetch +refs/heads/:refs/remotes/origin/ # timeout=10 > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > git fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/pull/:refs/remotes/origin/pr/ # timeout=15 > git rev-parse origin/pr/2203/merge^{commit} # timeout=10 > git branch -a -v --no-abbrev --contains 69ab966 # timeout=10Checking out Revision 69ab966 (origin/pr/2203/merge) > git config core.sparsecheckout # timeout=10 > git checkout -f 69ab9662497816fdd1f378f9a914f2f8a3f72391First time build. Skipping changelog.Triggering ADAM-prb ? 2.7.5,2.12,2.4.3,ubuntuTriggering ADAM-prb ? 2.7.5,2.11,2.4.3,ubuntuADAM-prb ? 2.7.5,2.12,2.4.3,ubuntu completed with result FAILUREADAM-prb ? 2.7.5,2.11,2.4.3,ubuntu completed with result SUCCESSNotifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.

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