DCD-1205: Simplify the pipelines generator.

pipeline_generator/templates/bitbucket-pipelines.yml.j2

@@ -18,9 +18,10 @@ pipelines:
     - step:
         name: Pre Parallelization stage
         script:
-          - echo "Running tests in {{ parallel_steps|length }} batches"
+          - echo "Running tests in {{ scenario_paths|length }} batches"
+
     - step:
-        name: Check if number of batches match actual number of scenarios
+        name: Check if the template is up-to-date
         script:
           - |
               actual_scenario_count=$(find ./roles -type f -name "molecule.yml" -exec dirname {} ';' | wc -l |  sed -e 's/^[[:space:]]*//')
@@ -30,14 +31,15 @@ pipelines:
                   echo "Mismatch between expected and actual number [${actual_scenario_count}] of scenarios. Please look at https://bitbucket.org/atlassian/dc-deployments-automation/src/master/DEVELOPMENT.md for instructions on how to fix this error."
                   exit $GREP_RETURN_CODE
               fi
+
     - parallel:
-       {% for parallel_step in parallel_steps -%}
+       {% for spath in scenario_paths -%}
         - step:
-           name: {{ parallel_step.name }}
+           name: {{ spath.parts[2] }}/{{ spath.parts[4] }}
            services:
              - docker
            script:
-           {% for scriptCommand in parallel_step.scriptCommands -%}
-              - {{ scriptCommand }}
-           {% endfor %}
+             - ./bin/install-ansible --dev
+             - cd roles/{{ spath.parts[2] }}
+             - molecule test -s {{ spath.parts[4] }}
        {% endfor %}