Remove playbook for test-jenkins

Instead we will create a test server using the jenkins_build play, with different values for configuration

playbooks/edx-east/jenkins_test.yml

----
-- name: Bootstrap instance(s)
-  hosts: all
-  gather_facts: no
-  become: True
-  roles:
-    - python
-
-- name: Configure instance(s)
-  hosts: all
-  become: True
-  gather_facts: True
-  roles:
-    - aws
-    - role: jenkins_build
-      build_jenkins_configuration_scripts:
-        - 1addJarsToClasspath.groovy
-        - 2checkInstalledPlugins.groovy
-        - 3mainConfiguration.groovy
-        - 3shutdownCLI.groovy
-        - 4configureEc2Plugin.groovy
-        - 4configureGHOAuth.groovy
-        - 4configureGHPRB.groovy
-        - 4configureGit.groovy
-        - 4configureHipChat.groovy
-        - 4configureJobConfigHistory.groovy
-        - 5createLoggers.groovy
-        - 6importCredentials.groovy