Merge pull request #13 from vmahuli/master

Changing project contrail-controller to contrail_controller
Revert "changing project name to contrail_controller"

This reverts commit 40c66c82bef2578306c63f304a24956ddf95b878.
Reduce systest compute nodes to 2, each of large flavor
CI sanity works with medium compute nodes
Start to run ci_sanity again with 3 medium compute nodes
Skip scons as packager.py builds required things by itself..
revert to large compute nodes
scons required before packaging
Manage VMs based on its uuid, not name
Expect meta data query to succeed
Ignore hostname get failure
reducing execution time