NEW JOB: update_scm_meta_git_for_dashboard

NEW JOB: update_scm_meta_git_for_dashboard

This job makes two mappings:
  1) mappings between git projects and gerrit domans
  2) mappings between gerrit domains and user-emails

This information is saved in JSON format.
This will be used in Tizen dashboard.

-- Previous version uses source management by Jenkins,
but it does not work properly.
Hence, it is changed to cloning git repositories manually.

Change-Id: I1198143e9f72a46807ffffb2d841f4c9c792c1dd
Signed-off-by: Junghyun Kim <jh0822.kim@samsung.com>