DRILL-6900: maven-release-plugin failure on the release:perform stage
drwxr-xr-x - .circleci
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drwxr-xr-x - .mvn
-rw-r--r-- 1383 .travis.yml
-rw-r--r-- 46514 KEYS
-rw-r--r-- 12781 LICENSE
-rw-r--r-- 238 NOTICE
-rw-r--r-- 3096 README.md
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - distribution
drwxr-xr-x - docs
drwxr-xr-x - drill-shaded
drwxr-xr-x - drill-yarn
drwxr-xr-x - exec
-rw-r--r-- 751 header
drwxr-xr-x - logical
-rw-r--r-- 128175 pom.xml
drwxr-xr-x - protocol
drwxr-xr-x - sample-data
drwxr-xr-x - src
drwxr-xr-x - tools