fixup circleci runner config

Author: brettwooldridge

.circleci/config.yml

@@ -2,11 +2,19 @@ jobs:
   build:
     machine: true
     resource_class: brettwooldridge/ubuntu
+    environment:
+      JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+
     steps:
       # Manually clone via HTTPS using a token instead of the checkout step
       - run:
           name: Clone Repository via HTTPS Proxy
           command: |
             git clone https://${GITHUB_TOKEN}@github.com/brettwooldridge/HikariCP.git .
             git checkout ${CIRCLE_SHA1}
-      - run: mvn clean package
+      - run:
+         name: Build HikariCP
+         command: |
+           export PATH=$JAVA_HOME/bin:$PATH
+
+           mvn clean package