* Unused module was removed
* Existing modules were updated
* Readme file was added
* Exceptions classes, used from unsupported exceptions from
oslo-incubator are moved to murano.common
* Orginize imports to the correct order in files, where the order were modified
Next patch will remove all locations of openstack.common.log usage
Change-Id: I4382215df1bcf81aea60e29039de548bcfe5a356