Merge branch 'enable-rspec-formatter' into 'master'

Enable rspec documentation formatter and color output

Current rspec just outputs a `=` as each test runs. This enables the documentation formatter and color output to make it easier to know what is going on with each spec.

See merge request !5924

.gitlab-ci.yml

@@ -82,7 +82,7 @@ update-knapsack:
     - export KNAPSACK_REPORT_PATH=knapsack/rspec_node_${CI_NODE_INDEX}_${CI_NODE_TOTAL}_report.json
     - export KNAPSACK_GENERATE_REPORT=true
     - cp knapsack/rspec_report.json ${KNAPSACK_REPORT_PATH}
-    - knapsack rspec
+    - knapsack rspec "--color --format documentation"
   artifacts:
     expire_in: 31d
     paths: