Resolve issues with circular dependency

 * Resolved issues with circular dependencies
 * Updated objects namespaces to the new io.murano.* namespace
 * Resolved a few issues related to not included code from PoC
 * Renamed objects to more pythonic name (back to original actually)

Closes-bug: #1297146
Change-Id: I34641eca33c70908bd44b50f0956abda9d8dbfa7
Merge "Resolve issues with circular dependency"