[JIRA] (OVIRT-1746) Make stand-alone upstream source collection and updating tool

Make stand-alone upstream source collection and updating tool ------------------------------------------------------------- Key: OVIRT-1746 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1746 Project: oVirt - virtualization made easy Issue Type: New Feature Components: oVirt CI Reporter: Barak Korren Assignee: infra Labels: poll-upstream-sources, upstream-source-collector The upstream source collection code is currently built included in two different files - "{{upstream-source-collector.py}}" and "{{poll-upstream-sources.py}}". The files reside in "{{jobs/confs/python-scripts}}" which in turn mean they are mean for embedding into jobs by JJB. This situation causes several issues: # It is not easy for users to use these scripts locally, and hence its difficult to build or test repos that include upstream source dependencies locally # There is code duplication between the two python scripts # Adding certain features is harder because it requires one of the scripts to have access to code that resides in the other script (See OVIRT-1641 for example) # It is impossible to use the code from pipelines (See OVIRT-1745) # It is not east to add tests for the code It is desirable to have the upstream source handling code be concentrated into a single tool that resides in the '{{scripts}}' directory.