Before and after build steps for code climate that handle parallelism

src/commands/code_climate_after_build.yml

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+description: Sum the coverage files and submit to Code Climate.
+parameters:
+  when:
+    type: string
+    default: on_success
+steps:
+  - run:
+      command: |
+        ./cc-test-reporter format-coverage -t simplecov -o "coverage/codeclimate.$CIRCLE_NODE_INDEX.json"
+      when: << parameters.when >>
+  - deploy:
+      command: |
+        ./cc-test-reporter sum-coverage --output - --parts $CIRCLE_NODE_TOTAL coverage/codeclimate.*.json | ./cc-test-reporter upload-coverage --debug --input -
+      when: << parameters.when >>

src/commands/code_climate_before_build.yml

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+description: Install the Code Climate reporter then run before build.
+parameters:
+  version:
+    type: string
+    default: latest
+steps:
+  - run:
+      command: |
+        if [[ $(command -v cc-test-reporter) == "" ]]; then
+          curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-<< parameters.version >>-linux-amd64 > ./cc-test-reporter
+          chmod +x ./cc-test-reporter
+        fi
+  - run:
+      command: ./cc-test-reporter before-build