Merge pull request #2 from X-Plat/change_to_collector

Change to collector
change containers list period
merge collector and etcd monitor
upgrade main entrance
merge monitor moudle with main entrance
change env.tar.gz
add log detail
fix comments
fix comments
Merge pull request #3 from X-Plat/merge_etcd_coll_thr

Merge etcd coll thr
add TODO and RELEASE
Merge pull request #4 from X-Plat/x-plat_dev

erease_collector_task