Start initial Glance refactor

*Started the intial Glance testsuite refactor using new Glance package
-Added behaviors
-Added client
-Added common
--Added constants
--Added models
---added links
--Added types
-Added config
-Added models
--Added image
--Added task
--Added versions

Change-Id: I7101bc8e4eb788194df39a34b7e984a7b43b7aec