Concreate

* com.redhat.component Label is now generated only if its not present in the image descriptor (191)

Fixed:
* Fixed merging of keys like description, name, version, release (156)
* Fixed schema validation for image schema (161)

Added:
* Added `--test-steps-url` option to fetch custom test steps definitions (125)
* Added `--build-osbs-user` option (163)
* Added `--build-osbs-nowait` option (180)
* Concreate version tool is now persisted in the image `org.concrt.version` label (152)
* Configuration file location(`~/.concreate`) can now be changed (172)

Changed:
* Descriptor got refactored to proper Descriptor classes encapsulating internal dictionary properly (167, 171)
* Overrides provided via `--overrides` option can now be inlined on the command line (175)

Modules required by other modules are now resolved properly (162)

* Added back possibility to inject local modules for compatibility reasons 148

* fixed Descriptor objects merging 144

* Fixed OSBS builder to build image which doesn't have any artifacts defined (140)