All of the common tasks shared across all of the playbooks have been
moved into "playbooks/common-tasks" as singular task files which are
simply included as needed.
* This change will assist developers adding additional playbooks, roles,
etc which may need access to common tasks.
* This change will guarantee consistency between playbooks when
executing common tasks which are generally used to setup services.
* This change greatly reduces code duplication across all plays.
* The common-task files have comments at the top for developer
instructions on how a task file can be used.
Change-Id: I399211c139d6388ab56b97b809f93d4936907c7a
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>