scripts/tools/rrs_upgrade_history.py: For initial import of recipe
use NoMaintainer by default.
rrs/views.py: Now is necessary to test if a RecipeMaintainer exists by
milestone to avoid errors for undefined variables.
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
rrs_create_milestone.py: Helps in Milestone creation.
rrs_upgrade_history.py: Recreates upgrade history from recipes, this
should be run at initial installation.
rrs_upstream_email.py: Send Upstream report to mailing list, this
report contains information about recipes that need upgrade.
requirements.txt: Add tabulate module that is needed by
rrs_upstream_email.py.
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>