Add additional context for lightspeed suggestions

[ganeshrn]

For each of the completion request send addtional context as below

• The variables referred in the list of vars_files keyword if present and can be resolved to a path of the file system.
• The variables referred in the include_vars task if present and can be resolved to a path of the file system.
• The list of roles and it's data
  • The relative path of role with respect to the playbook path
  • The name of the role
  • List of tasks within the role
  • The default variables under the default folder
  • The vars varaibles under the vars folder

Note: Only the variable structure and key value is preserved and all the
values are removed.