Making the type and null check for os_distro optional according to import image_type
Merge pull request #304 from manalilatkar/os_distro_optional

Making the type and null check for os_distro optional according to import image_type
Added logging on RabbitMQ connection error and revival
Merge pull request #305 from anujm/add_logging_for_rabbitmq

Added logging on RabbitMQ connection error and revival
log decode errors, do not ack.
Merge pull request #281 from TelekomLabs/log_decode_errors

log decode errors, do not ack.
Promote master to stable
Merge pull request #311 from anujm/stable

Promoted master to stable